UGG, Should I break up with my boyfriend?

So alot of boys in my school wear the clic uggs, you know the short kind and mostly these Ugg bomber boots. I told my boyfriend if he ever wore Uggs Id break up with him cuz its gay but this really rich girl in my grade said she thinks guys look hot wearing those Ugg bomber boots and that my boyfriend should get a pair. Well last night he shows up at the movies with his friends and some wear Uggs wearing the clic bomber uggs. When I asked why and where he got them he said dont worry about it. Should I keep my threat? I think that rich girl did it and bought them for him so I would break up and she could have him. What should I do.