<human>: I met this guy online who was 3 years older than me through a gaming website. We became really close from the beginning and had deep conversations about various topics and our lives, etc. From the start he had told me that he had a girlfriend of 6 years. I've never been emotionally tied to someone online before (neither had he) but I started developing small feelings for him. He told me a few months after chatting that he had a crush on me but that it was harmless because we weren't doing anything compromising that would endanger his relationship (which we weren't), just talking. He said he enjoyed talking to me more than he'd like to (because of his feelings).  

Our communication up until that point had been solely through this gaming website (their chat feature). One day, about 3 months after meeting him online, he asked for my Skype. As a side-note, we had never exchanged pictures (and still haven't). We started chatting through Skype text (not video) and one thing led to another and we ended up getting pretty intimate. We left the conversation that night and I ended up feeling terrible about it (because he still had a girlfriend) and I wrote him on Skype the next day apologizing for my behavior, etc. Couple weeks pass, we talk a little bit intermittently (through the gaming website) and then he completely disappears and removes me from Skype. It's been 2 months now and there has been 0 contact or explanations. I'm just confused as to what happened in his mind?

As a note: he's not the kind of person to cheat even though all this happened, nor has he done this with anyone else before. Before you say, "you don't know that" ...just trust that this was the first time for him to be in a situation like this, as well. I just want to know what happened.

Can you condense the text into a few key points?
<bot>: Met this guy online, he had a girlfriend, became emotionally vested, talked on Skype once (got pretty intimate), he disappeared and removed me as a contact. What happened?