I'm going to tell my friend I never want to see her partner again
Are you sure you don't want to see your friend's partner?
Yes. I'm done with her and her stupid life and boyfriend and I don't like that she's forcing me to associate with him.
You should be polite to your partner's friends, even if you don't get along. Maybe you can limit your interactions with them if it bothers you. Being harsh about it might upset your friend and force her to choose.
So I should like everyone my friend likes?
No you don't need to like them, but it is easier for everyone if you can at least be civil. Try and find something you have in common or something you can talk about. That way you can at least tolerate him and keep your friend happy.