It's my fault....

I hate admitting that my D&D is likely my fault. I met the N I was seeing at a concert (a cover band) that plays pretty frequently. In any event, 2 days after the last time I saw him, I went to the same concert with some friends. I had a great time, danced with a guy and gave him a kiss (it wasn't a passionate kiss and there were no numbers exchanged and I did not see the guy again). It is important to note that I did look for Mr. N at the club and did not see him, but there is an upper level. I had tried to contact Mr. N a couple weeks later via text message but received no reply. Literally a month later I received the D&D call. He asked what I was doing, I told him I was watching TV (I was still in my very "I am so happy you called" mode) and his response was "Is that all?" Implying that I wasn't alone. The whole conversation was weird. He joked about me being his trophy for doing well at school and that he would see me on Friday. Friday came and there was no call, no text...Mr. N didn't show up and I haven't heard from him since. The ONLY thing I can think of as to why he was so mad at me is that either he was at the show or that guy I danced with was a friend of his. I am wracked with guilt. I had no intention of ever hurting him and the other guy was just a distraction and it meant nothing. But I have lost someone that was incredibly important to me and I never had a chance to validate if my assumption was right or apologize. I hurt so bad.