Confusion

Sometimes I just don't get people. I had added this guy on Facebook a while back because I had seen him around at shows, and we had a few mutual friends, and he goes to AUM so I figured why not try to make friends with people that go to the same school as me. He also took one of the classes I was going to be taking, so I figured I could ask him for help if I needed it, because I am terrible at math, but sadly so was he, so he wasn't much help anyway. Well, at the time we began talking he was having problems with his relationship. Him and his girlfriend were on a break, and I could relate to him. The problems he described having in his relationship were identical to mine in my own relationship. I would talk with him and try to give him advice and tell him not to give up because the girl was obviously worth fighting for. I could tell he really liked her. Even loved her. We ran into each other a few times at school. I also saw him at Warped Tour this past summer, and I told him and he asked why I didn't come say hey to him, so I figured if I saw him at school I would say hey next time. We talked a few times in person and then all of a sudden he started talking to me less and less, until he just completely stopped. Him and his girl got back on track, and I'm happy for him, but I don't understand why all of a sudden when things become good with his girlfriend, he completely ignores my existence. He did say that he got jealous when his girl talked to guys, and I'm sure his girl probably gets jealous when he talks to girls. I don't know. Something just seems fishy on his part. We were getting to be good friends and that just stopped dead cold. Guys are stupid. Not only are they impossible to date, but apparently they're impossible to be friends with too. Ha But I will keep trying and working on my own relationship for the time being.