Dilemma:( what should i do?

So i've been dating this guy for about 5 months now and were set to go to Cancun next month for vacation and were all booked in and have already paid...anyways yesterday i made an account on a gay dating website just to see who is out there and if anyone i knew had a profile...then i wanted to see if my boyfriend had a profile and he did, so then i started to worry a little bit because of what he was "looking for" and i had noticed that he had been online the previous day...so i made a fake profile in his county of a cute guy and within lk 12 hours of it being up he had already sent a wink out..this really hurt seeing that its been such a great relationship and he does so much for me, and the fact that he's the only guy i've ever been with...i don't know whether to confront him now and just go on the vacation as friends or just let things go for a while and enjoy the trip then figure it out afterwards...Please help i've been thinkin way to much about what i want to do