Fiancé and friends

Is it weird that my fiancé just doesn’t really want to interact with my friends. I just had a some friends over our house for a few hours to hangout. I would like my fiancé to at least say hi but he always leaves before they get here and then goes to his parents house to hangout while my friends are here. My fiancé can hangout while I have 3 friends over but he just always dips.

My friends were like why does he just leave whenever we are here? I’m like I have no idea, I want him to stay but he just always dips out