Why?!

Three days! Three fucking days and it feels like 3 months...I hate myself for wanting and needing him, it's not fair. Why can't I just let it all go? It's because I'm not only not talking to someone I loved and had an intimate relationship with, but one of my best friends...I talked to him so much and he was the only person I could really enjoy talking to...I want to talk to him so much I feel like I'm going to break down...
But if I talk to him...what am I supposed to do? Keep getting hurt...stay in love with him and never experience someone else? Why, why, why can't I have someone like him right now who didn't hurt me?
If I talk to him, I'll hate myself. If I don't talk to him...I'll just be depressed. I can't stop thinking about him.
By not talking to him, am I just avoiding him? Am I avoiding what I really feel? What am I supposed to do?