I'm going to immediately bail on plans when I see my friend's boyfriend there
Is there something wrong with your friend's bf?
I don't like him and I don't want to see him.
Your friends have already made plans and are expecting to see you there. Even if you don't like someone's boyfriend, you shouldn't upset all of your friends by abandoning them.
I hate that guy, he keeps telling me to stop coming to his house.
What are you doing in his house. Does your friend know you are going to his house?