Man, that was a heavy fucking read, I can understand how terrible you feel.
About the weight-loss, it's normal if you're stressing, but the weight gainers probably wont help that much until you get over it (more), for me it just slowed my weight loss down when I was stressing over my girlfriend.
We all know how we 'should' act, but it's sometimes hard to actually do that, you just did what you felt at that moment and it's no use being mad/disappointed in yourself that you should have acted different in the past. Just see it as a
lesson learned
My thoughts on this:
I don't think you will be getting her back.
This other guy she's seeing now, he's most likely just there because she needs a gap filled in her life, the gap that you left. She will spit him out after a while too when she sees he doesn't fill it.
There's nothing you can do to make her want you back, and she probably won't forgive you for the things you said or did.
You have to fix yourself, and the only way to do that is to
pick up your life again, get some distraction, maybe do some things you've always wanted to do.
What I did when I broke up with my ex girlfriend, was just socialize like mad, the last 3 weeks (it's only been 3 weeks since we broke up) I've been going out 4/5 nights a week, getting to know more people (especially women), and just having a lot of fun with my friends. I've scored a lot of numbers and kisses and had dates with 4 different girls (layed 2 of them) and sure, they dont feel as right as my ex girlfriend, but it's REALLY good for your ego when other girls tell you that you are amazing and that they fell for you so quickly. Be
honest about your intentions though, don't pretend to like them as much as they like you if you don't actually do. You say you don't have interest in other women right now and that is understandable, but trust me when I say that they will make you feel better about YOURSELF, and that is most important.
Forget the possibility that you two might end up together again, because it is out of your hands now. Give up on your hopes that she might want to see you again, you will only torture yourself with those thoughts.
Quote:
My plan from here is to start working out, gain my weight back, start back in school full time, and not contact her at all
This is a good plan, and I wish you the best of luck with it. Stay strong bro.
Chillburg.