Awkward around fiancé’s friends.

I don’t talk to them, they don’t talk to me so everytime they come over it’s super awkward.

My fiancé has left me and fucked around so much. Like 10 times. These are the friends that he fucks around with when we are broken up. Things have gotten a lot better and he’s changed, we have another baby on the way so that’s Why I’m even giving him a chance to prove himself. But idk what to do about the situation cause I don’t like his friends and they probably feel stupid. So any advice