I think it would be really helpful to read this from this thread.

It really helped me a lot when I was going through the process of dealing with the end of my first relationship. Things are going to suck for a while and it's going to be out of your control how long it lasts, but accept your feelings and know it will get better one day.

Last year I never thought that I would feel "normal" again, like part of me was always going to be missing, but one day I just didn't think about it anymore and that's when I knew I was fine. It took me months though.

One piece of information that helped me deal with the breakup was the fact that everybody will feel or has felt what you are feeling now...so you're not alone. Talk to close friends/family/therapist it really helps. I started journaling to get over my breakup and I still update it now even though I'm okay. Just maintain a healthy lifestyle and take care of yourself. Don't forget to eat and most of all DON'T BLAME IT ON YOURSELF. Things are irrational so don't try to rationalize the end of your relationship and blame it on yourself like I did.

And I'm not sure if you want to hear this...but it's not wrong to want to be friends, but it rarely works out when one person is still in love with the other. As long as you still want him back, maintaining a friendship with him is unhealthy and will prolong your recovery. And it makes perfect sense to want to be friends with somebody you care about like that, but don't expect it to happen because it's not all under your control. I'm still friends with my ex, but after meeting up for the first time since our breakup, I realized that we were not going to be the best friends I though we were, which hurt tremendously. People change you will change. Sorry for the negative ending but it's just something I really wish I knew before.