I need to eat MORE calories?!

Well, prepare for the broken record eat more! It's not really about losing weight, as it is about losing fat, right? Well, ideally that has to come from fueling yourself. 700 calories will not do at all. You're risking long term damage to your vital organs by sustaining low calorie amounts like that. Avacado, nuts, do you eat cheeses, yogurt, etc? Add oil to your cooking, drink some of your calories if you have to.

If anyone 'attacks' you, it is because they are concerned to see a fellow human being destroying their health.
You might not think you are hungry, but I can assure you, your body most definitely is hungry.
Why aim for a goal weight, if your goal is not also health and fitness? It is about much more than a scale number.
I am 5'10 also, 133Ibs, and eat over 2000 calories a day with my workouts, sometimes closer to 3000.
Going the way you are going, you are going to basically erase all your muscle, leaving a saggy mess of loose skin and fat because you are not doing things the right way.

I suggest you increase your calories by 100 a week, which should be perfectly manageable, incorporating things like Greek yoghurt, sweet potatoes, peanut butter, nuts, seeds, oatmeal, vegetables, avocado, eggs, cheese and if necessary, drink some of those calories in the form of smoothies or shakes.

If you find you cannot do this by yourself, then I would echo what others have said and seek professional help.

Hi, I used to eat 400-600 cal in a day. It was sad, I thought i wasn't hungry but it was my head doing all of it. I have had an eating disoreder for two years. I ate nothing and i got super sick all the time, felt dizzy and weak. I hated it so much. About a year ago I stated slowly add more food in. I went from a 400 cal to 1,200 and now at 1,400 sometimes more. I eat pretty healthy and I let myself have a piece a cake or chocolate I just limit myself. Trying adding food in slowly! Maybe eating a bigger breakfast.

I'm wondering why at your height and weight you are seeking to lose more and are eating at a dangerously low calorie intake. I am not a professional but this seems like disordered eating, possibly anorexia. Have you consulted with a doctor? Like someone else said, you need professional help if you find you can't feed yourself properly. The people on these message boards can't help you with the problem that you have. It's far more serious than that.

You don't need to lose weight - it seems like you may need help with your relationship with food and your body. This is self-destructive behavior and indicates that you aren't caring for your body properly.

It's no joke, you are slowly destroying your organs, and mostly your brain. Serious, permanent, debilitating brain damage occurs when you don't consume enough calories and fat for an extended period of time. A relative of mine suffers severe dementia and is in a nursing home in her 30s because of anorexia. She can no longer care for herself and has no memory of her loved ones. It's heartbreaking. The worst part is, up until she began to suffer severe symptoms she felt "fine" and even did some sports and seemed healthy. Most people didn't know she had an eating disorder as she didn't look like how people imagine anorexics look. But by then the damage had already happened, and since then she's been on a decline. Nobody knows how long she has left to live or how her quality of life will be.

I don't think people realize just how serious starving yourself can be. Even if you don't die, even if you feel "fine", you aren't. Your body is is breaking down. One of the first symptoms is a constant feeling of "fogginess" or inability to concentrate on a regular basis. My own doctor told me this is a symptom of your brain not getting enough nutrients. I myself have a heart arrhythmia as a result of an ED. Fortunately in my case no serious damage was done and if I care for myself from now on, I should be okay.

Please get the medical help you need. I repeat that we on here cannot help you in the way that you need. We care and want to see you succeed in being healthy. I think you need to be really honest with yourself about the real issue here.

ETA: In the meantime, my suggestion for adding more healthy, quick, easy calories and nutrients to your diet is to use nutritional shakes. They can really help. A lot of people use shakes in recovery because they're not as filling and they are nutrient- & calorie-dense. Plus they're easy and quick to make and you can drink them everywhere - like while driving or at work or whatever. Don't use the weight-loss ones as they are too carb-heavy. Try to get the ones like Ensure.

I know I am in the healthy weight range, but I'm just not happy with my appearance. 135 is still in the healthy weight range for my height. It's not that I hate my body, I just think I could improve it. And my stomach and thighs are flabby, I want a six pack.

If you don't understand that you can lose weight eating the proper amount of DIFFERENT foods, there is nothing more to be done on this thread! You should be eating 1900 calories for your height and weight and you will still lose in an intelligent way.
If you need more attention go seek it elsewhere!
How many people have to tell you that what you are doing is dangerous????
I believe your brain is already affected from your lack of adequate nutrients.
Good luck.
ETA-you will never get a "6 pack" eating the way you are!
You need lots of protein, veggies and fruits of which there is virtually none in your present diet.

How did you get to your highest weight of 165 if you are naturally picky/get full easily and rarely feel hungry?

Just to add before any one takes it the wrong way, 165 was not overweight for your height in the first place. I'm basically just saying if you were able to be / maintain that weight previously before deciding to lose, you must have been eating more than you are now at that time.

Adding my recommendation for heading to the Gaining Weight forum and asking for advice.

If you want a six-pack and to be nice and firm, only adding muscle to your frame will do that for you (based on your description of yourself). You need to build some, which means you need to make progressive weight training your exercise priority, and eating a surplus of calories with a good macro breakdown your dietary priority.

Seriously, 600-700 cals? I'm surprised you haven't passed out with the exercise you do by now.

What everyone else said, x10000. As for WHAT to eat: ditch the Quest bar (I know, I love them, too) for 2 slices of toast with peanut butter. You'll get about 100 more calories, and probably actually be LESS full. I know that sounds weird, but, for me, Quest bars will fill me up for hours. I can go an entire work day on a Quest bar and a string cheese.
Stop using "fat free" products. The full fat ones are way tastier, and will up your calorie count.
Try adding a banana to your cereal.
Add bacon or turkey to your morning bagel. 2 slices of bacon will set you 100 cals and you won't even feel the difference in fullness.
Butter the heck out of your muffins.
Have a fudgesicle for dessert. Again, you won't feel fuller, but it's creamy, dreamy and delicious!
A few of these changes each day will easily bump you up a few hundred cals. You tend to eat the same things often, so add one or two and eat it for a few days until you get used to it. Then add another. And repeat.

^^this!!!

You don't need to throw out any food. Just eat more of it!

Honestly, your period has stopped. You need to talk to a doctor and eat more.

Drink juice, milk and protein shakes, liquid calories count.

It sounds like you have at least the beginnings of an eating disorder...you should consider getting some help.

1900 is enough.
2000 is the maximum amount for an adult woman.

This is patently untrue.

It depends on your size and activity level and what you are trying to achieve (weight loss, gain, maintenance, etc.) Extremely active people often need up to 3000 calories a day and more if they are doing athletic training. You have to calculate specifically for your own needs. There's no magic number that's good for everybody.

For me to maintain my weight it's 2100 calories a day, which is what I consume, and I'm an adult woman. If I maxed out at 2000 a day I'd be losing weight. At my most active I consumed up to 2800 per day and was extremely lean.