I am beggin, help me lose weight.

Hey everyone. I am 20 year old female, 5'5 , 260 lbs. I've tried and failed for 4 years. I can't control myself. I live with parents so I do not really get to chose food since my dad loves to eat like a man , and I can't handle the smell or presence of yummy food. My problem isn't really that I eat fastfood or junk food, it's more about HOW MUCH. I am sick of being the way I am, I am also prediabetic, but even that doesn't scare me into losing weight. I want to, sooo bad. But I lack self control, please, I am begging you, I am sure there are people just like me who battled through it and lost weight. Please help me.
Thank you.

what do you mean by 'eat like a man'?

That phrase makes me think its encouraged to eat huge amounts of food in your family. I have family members with unhealthy attitudes towards food too. Its all about educating yourself and recognising why you're eating so much//making bad choices//whatever the problem is.

Its all on you though. Nobody can make you lose weight. Maybe a goal to work towards would help motivate you? Like starting C25K, or a fun-run, or something?

Meaning he needs to eat real food like meat, potatoes, salad with mayo, etc. No healthy"rabbit food" or boiled chicken breast.

you can eat foods like that. Not in the same size portions as your dad but you can still eat those foods, and they are healthy. (okay mayo isn't all that nutritious but you don't have to have a huge pile of it, but you can have some)

what you need to do is find the largest number of calories you can eat while still losing weight slowly and steadily. Set MFP to lose 1lb a week and eat back exercise calories (calculate your calorie burns carefully though, if you think they're overestimates then only eat back 80% of your exercise calories). You need to be able to eat enough to enjoy your food and not feel deprived, to eat all the foods you want to eat (though some of them you'll be eating smaller portion sizes). The idea is to not feel deprived at all. When you don't feel deprived, self control is much, much easier.

this way of losing weight takes longer. But the benefits of it are 1) it's a lot more sustainable, which is essential, because you have to stick with your new eating habits for life or you will gain the weight back again. 2. it's actually more healthy. Losing weight too quickly, by eating too little, can cause quite a few problems, such as loss of lean muscle mass and bone density, and also slowing of the metabolism which goes along with lacking energy and feeling generally run down and depressed (this is because your body's saving energy, so less energy is being used for non-essential things). All these things set you up for rebound fat gain. However, taking a slow, long term approach means you're more likely to be losing pure fat, and more likely that you'll be able to keep that fat off for the rest of your life.

Exercise is important for health, i.e. strong muscles and bones, this protects you from all kinds of health problems, plus it gives you more calories to eat (i.e. eating back exercise calories) - again, look at long term sustainability and choose a form of exercise you really enjoy and will be able to stick to for life. Also, for health, focus on foods you should eat for nutrition, i.e. getting enough protein, healthy fat, carbs, vitamins, minerals, protein, fibre and water... if all those things are in your diet you can eat whatever you want with your remaining calories, provided you eat your goal number of calories. Going over your goal once in a while won't hurt... going over most days will kill your deficit (i.e. you won't lose so much weight).

Hope that helps! Keep it simple, easy and sustainable. Don't eat more than your calorie goal, but make your calorie goal your "ideal" number of calories where you're seeing slow and steady weight loss but also have enough calories to be able to enjoy all the foods you like (albeit in smaller portion sizes)

you need to focus on long term maintenance and sustainability, it's not about how fast you can lose the weight.

I used to eat "like a man", look where it got me! I wish I knew when I started how easy it can be to prepare healthy filling, delicious meals. My current go to is chicken wraps. You know those bags of loose salad they sell at grocery stores? Empty that into a couple of wraps (warmed up in the pan) , throw in some microwaved chicken breast and some low cal dressing and you've got a healthy delicious dinner that takes minutes to make.