What would you do?

So me and my fiancé’s friend asked if we wanted to hang out today. I told my fiancé I’d rather hang with my own friends or go see my mom or something (I don’t enjoy myself too much when I’m with his friend. It’s really boring and they just talk about video games and money lol) so my fiancé responds with “well if you don’t go then I’m not going” and I asked why and he said “I don’t enjoy myself over there unless you’re there” and I didn’t know how to take that.

I am so bored and ready to go every time I go over there, but my bf won’t go over there unless I’m with him. The worst part is his friend calls or texts just about every day asking if we wanna come over and hang out and my fiancé says he hates saying no and making the guy feel bad cause he can tell his friend is alone and sad. Ugh. What would you do?