If I had been invited somewhere I really wanted to go to then I would still do that, even if I hadn't seen my boyfriend for a couple of weeks, on the basis that I could see my boyfriend a other day and spending time with friends/keeping up hobbies and interests are important.
I might also tell him if there was going to he a other man there who I knew liked me on the off chance he found out at a later date and felt I was keeping it from him. I'd probably also try and make light of it.
I'm not a player or a crazy maker but I'm also not joined at the hip to anyone else and like to do my own thing and make my own choices.
I wouldn't appreciate someone trying to make me choose between the two. I dont agree that if someone is interested they should put you above everyone and everything else.
However, it does suggest that this will be a recurring issue - I, for example, fully intend to prioritise myself at times in a relationship and couldn't be with someone who sees that as a reflection on my feelings for them.
His comments about enjoying women being jealous and telling you that someone else was all over him put this into a completely different category for me.
I'm afraid I agree with the others and you should end this.