Why did he blow me off?

So I met this guy in a band. We started talking, sometimes till 4 in the morning. He told me he started looking for me at his shows and invited me to ones he had out of town. I couldn't because of just things like work or friends birthdays. Finally I was able to make it to one he invited me to. He played, then came and sat down with my friends we chit chatted, then he left to get a beer and didn't look or talk to me for the rest of the night and hasn't since. My obnoxiously blunt friend even told me it wasn't awkward. I've tried hitting him up here or there without getting intrusive but I can't get him to talk past the how are yous. I can't figure out what I did! Help!
Updates
+1 y
We met at one of his shows, not online.
Updates
+1 y
I would understand if we met online, but I had met him at a couple of his shows previously before we started talking.
Why did he blow me off?
Post Opinion