I'm a little embarrassed to be posting about this but I didn't want to keep it to myself any longer.

I met this guy through mutual friends. We share a lot in common and got along well. I was never interested in anything more than friendship and I was already in a long-term relationship at the time. He knew this when we met and I didn't suspect he wanted to be more than friends anyway.

The trouble started when my boyfriend of the time broke up with me and only a weeks later this guy asked me out. I didn't know how to handle it at the time as I was shocked so I just said I'd think about it. Then a few days later he asked me again and I told him no, but I was really not in the mood to be dealing with it so I was a little harsh and he just walked off. Then he emailed me saying he wasn't going to talk to me ever again because I'd been so rude to him.

Eventually we made up as friends and I thought everything was fine again until we fell out again, I don't even know what it was about this time. He said I was treating him unfairly like I wasn't paying any attention to him and he called me a *****. This sort of thing has happened about 3 or 4 times and I've had to block him on social networking sites. I keep trying to stay away from him but then I end up feeling sorry for him and he emails me apologizing and saying he missed being my friend.

I don't think he's ever had a girlfriend and someone told me he had a crush on some other girl for years before he met me, he's also depressed and I don't know if he's bipolar or something. I just wish he could leave me alone and forget about me but I also feel sorry for him and really enjoyed his company before all of this kicked off.