I don't want to be near my grandma's bf
Is there something about her BF that bothers you?
We don't get along and have nothing in common.
You should try to get along with them. They are your grandma's bf and it would make your grandma happy that you get along.
I don't care about grandma, I just want him to fuck off.
It seems like there might be some harsh feelings there. Regardless of how you feel, at the end of the day, you should try to get a long with them, it is important to respect your grandparents and their partners.