Man, I really screwed up this time..

I got really ticked just thinking about how life is for me right now. As you may not know, I'm working to try to get over this guy that I pretty much fell in love with. Well, here's the problem with that, he's my best friend. Yeah, big problem. But he knows how I feel and he knows that I'm trying to move on. We already had that discussion.
But last night, I got so frustrated with all the crap that's been going on, that I wrote a bulletin on myspace and asked one of my friends to have him read it. Well, I didn't think that he would say anything about it. I just thought he'd call me stupid for feeling the way I did, seeings how I explained how i pretty much fell in love and how hard it is to watch him date other people.
But he did say something. I had gone for a walk and when I came back, there was a message waiting for me on yahoo. It said: If you knew the reason I couldn't date you, you would understand. But I don't know the reason, so therefore, I don't understand. I just wish he would talk to me. I asked him if this had anything to do wit the thing that he couldnt tell us, but all I got out of him there was 'not really'. I'm so confused about this whole mess. i don't know what to do anymore. If you guys have any advice for me, please let it be known. I really need some right now..no joke. Well, enjoy the last few days of winter break. See-you guys later.