Is it possible to lose 40-50 lbs in 5-6 months?

Hi,
I'm trying to lose weight for my boyfriend's graduation that is coming up and I want to be able to wear something cute without the constant voice in the back of my head worrying if I look bad or if I'm too fat for this dress etc. I've recently changed my eating habits. Focusing more on healthier foods that will keep me full instead of making me reach for a bag of potato chips. I workout at least 30 mins with combined cardio and strength, and am gradually working up to putting more time in. My height is 5'5 and I currently weigh 175lbs. My goal is to be atleast 135 or less by around the middle of June.
If you have any suggestions on workouts or clean eating I would love to hear it!
Thank you for your time and answers.

Back in my 20's I went from 260 to 166 in 3 months. This was done going totally vegetarian, 2 hours in the gym doing cardio and circuit training 3 times per day and drinking a ton of diet coke. Unhealthy, yes. I didn't know what I was doing at the time, but yes, I got it done. You have to really want it. Find a healthy way though.

And here you are back with 140 lbs to lose, clearly it didn't work out.

I'm shaking my head at some of these answers. Also, losing your first 50 lbs is nothing like losing your last 50 lbs.

OP, don't do it! I lost 40 lbs in 4 months when I was 21. I gained it all back and more in 6 months because I never learned how to eat properly, and got stretch marks and whatnot in the process, which never went away.

I'm trying to lose weight for my boyfriend's graduation that is coming up and I want to be able to wear something cute without the constant voice in the back of my head worrying if I look bad or if I'm too fat for this dress etc.

It looks as though the OP has dropped off the thread, possibly because she hasn't received much enthusiasm for her plan, but just in case she's still listening: Maybe you can lose 40-50 lbs in 5-6 months, but it's not likely at your weight (it's easier if you start out severely or morbidly obese). And it's no guarantee that the voice in your head will go away. The voice might still be there at 135 lbs or 130 lbs or 125 lbs, either because you might be a thin person who is not fit ("skinny fat") or because the voice has more to do with your self-image and self-confidence than with the number on the scale. Make good choices about what you eat, keep your workout commitments to yourself, and stop listening to the voice NOW. You can sizzle in a great dress whether you lose 40 lbs, 30 lbs, 20 lbs, or 10 lbs by May.

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Maybe you can lose 40-50 lbs in 5-6 months, but it's not likely at your weight (it's easier if you start out severely or morbidly obese).

It is completely possible, I'm down 48 lbs in 5 months. I'm eating 5 or less grams of fat and sugar and walking 30 minutes daily and it can totally happen! It takes a lot of effort but you can do it!!!! Best wishes!

You and the OP aren't exactly coming from the same place though.

Hi there, just as a source of encouragement, I did it, and it took a lot of will power, sticking with the food diary, and lots of walking. I walked an average of 20km/week with my dog, usually 5 times a week. I ate as clean as I could, but did have some bad days in there too. Just remember you are doing it for yourself.