Sounds like he's in a bad place, and he didn't trust you enough to tell you what was going on, as he doesn't know you that well. Don't take it personally. Some people are just more closed with their personal problems. A lot of that has a lot to do with being made fun of in the past. Since he's in a bad place he may not be emotionally available to date right now.
Try to keep in touch and tell him "I'm here if you want to talk to me again but the ball is in your court." This says you are interested but he has to make the next move.
I have a long time interest in psychology, specializing in relationship dynamics for 30 years.
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