My roommate is engaged with a girl who doesn’t respect him and he keeps going back because idk he’s stupid?? What do I do to him?

My roommate is engaged with a girl who doesn't respect him and he keeps going back because idk he's stupid?? What do I do to him?
My roommate is engaged with a girl who doesn’t respect him and he keeps going back because idk he’s stupid?? What do I do to him?