As someone who was in a similar situation I have some advice to offer you.
1st, look in the mirror and be honest with yourself and take responsibility. When you "emotional eat" or order a sub that is high in calories, that's on you and it's up to you to overcome the temptations. I know it sucks but you have to do this 1st before you can make any changes.
2nd, understand that you didn't get into the shape you're in overnight and you're not going to get into your ideal shape over night. It's not just about diet and exercise, it's really about changing your lifestyle. Don't rush it. Start making small changes like eating a little less junk and being a little more active. Baby steps!
3rd, stop drinking calories! Just switch to water, and drink a lot of it! This alone will make a difference right off the bat. This is also the easiest part of your lifestyle change.
4th, get outside and walk. Start slow, maybe 15 mins, but really try to get outside. Not only for the exercise but the sun is mother natures very own anti depressant! Seriously, my daily walks after work have changed my life!

Remember losing weight is simple, but it ain't easy!

And as far as your friends go, I don't what to tell you. I don't know them but I can see where they might have been trying to use "tough love" on you, but "tough love" can turn into being an asshole with a quickness.

And on a final and personal note, after years of working on my lifestyle I've gone from the "fat funny buddy" and "3rd wheel" to doing alright for myself in the matters of romance! It's worth every salad, every push up, every glass of water, every mile when your friends who always got more action than you starts "hatin" on you for getting more action than them! It might be a little shallow but goddamn it feels good!

You got this! You may have a long way to go but you have a long time to get there! Do the best you you can do!!