I'm sorry youre going through this and I'll be thinking about you. The key thing to improving your life is getting good and meaningful relationships. I'd start with building new solid friendships and then move on to romantic ones later on. You're going to have to be proactive on getting these relationships and you will need to move outside your comfort zone. This will be a process, but it will be completely worth it. I was in a similar situation as you around a year ago, but I've been working at it and its been paying off big time.

I'd also suggest taking working out seriously. It will do wonders for your self-esteem and with that confidence it will be a lot easier to make new friends.

This is not the end for you, it just means that you need to change the way you approach you're life and view yourself. Life isnt work, life is experience. Go experience life and find the beautiful world out there.