Miami or my bf ?

So my girl friends and I have been planning for go to Miami for a week in June. At first when I asked my bf if I could go he said yes so I was all down to go and was so psyched but now that he sees the trip is really happening he got all defensive. I really want to go to enjoy myself not to cheat ! Lmao wtf

What should I do ? Go to Miami w the girl and say fuck my bf or be considerate of his feelings and no go ?