This is all great advice, thank you all very much. I will do what all of you are suggesting; I will keep a close eye on things over the next little while, without being obvious or too posessive about it, and basically let this one incident go.
We have discussed the flirting thing and he said that next time he has a party, he will pay more attention to me and personally take me around and introduce me to people. I will try it one more time for him - but if the next party is as awful as this last one was, I'm going to have to ask him to tone the party life down a bit because it is not a lifestyle that I want to be a part of. He also says that around new years, one of his friends comes out to visit and they always have a guy's night and go to the strip club. I have that to look forward to now also...woohoo. Sounds like a great catch doesn't he?