I Just Don't Know..

I just don't know what to do anymore. 
In some ways, I like not talking to him, because it helps the feelings go away, but then I hate it, because I wish the feelings could stay.
It really doesn't help either when I sit by him for an hour in Theatre and talk to him.. I wish I could have those days back.. But I never will. He likes her now, and I have to live with it.
But on another note, I miss him(a different him).. He said we already tried once, so we can't try again, and my friends say they can make it happen, but I just don't know. What if I get attached? What if it makes things more awkward? What to do, what to do..
And then him. What to do about him.. I don't know. I like him, and he doesn't like me. He hasn't given me a chance, and he probably never will, whether he's given one to everyone else or not. I know I'd be stabbing everyone in the back, but I just can't help it. Why can't I hate him?
I just don't know what to do anymore.