They're in town now and they invited me to go out and have a few drinks. However, I know if I go and tell my bf he'll be pissed and will probably break up with me (he doesn't like them because when I was single and went out with them I hoked up with guys and because they're friends with my sort of ex).

What do I do? I don't wanna lie to him, but I also don't wanna dissapoint them.

(BTW, I really want my relationship with my bf to work... I have never told my friends that he dislikes them).

So talk to him, tell him you want to see your friends.  Tell him that you have him, and that what you did before you were going out with him isn't something that you would do now.  And he needs to understand that too.  He has to trust you... if he's worried you're going to go out and do something with another guy, then that's another problem that will start pulling the relationship apart.

- or -

dump him. who would you rathar have, a boyfriend who sounds extremely possessive or friends that will be there for you and too hang around with and have a laugh with.

i know who i would choose
my friends. theres no competition with that situation

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Distance Doesnt Ruin A Relationship.
You Don't Have To See Someone Everyday To Be In Love

Grow a backbone and tell him you are going and having a good time and not to worry one bit about you hooking up.  Tell him if he wants to join you later with them to come on.  Otherwise stop his pouting and controlling behavior.