UPDATE will he cheat?

This was my original post a few days ago!

So I need some insight and probably a hug..my boyfriend is off to Mexico today for spring break and I expressed to him weeks ago over and over about how I’m uncomfortable with it but he said “you should trust me I don’t cheat” and in arguments he said he was still going regardless it’s a all boys trip so I wasn’t invited and ALL of his friends are single that are staying with him in his villa and he told me all his friends were joking saying “what happens there stays there” and said “They are dogs don’t worry I’m faithful” what do you think? Am I being controlling? Do you think he will cheat?

UPDATE

A friend of a friend I have on snap and in a Snapchat video I seen this girl twerking on his and as soon as he sees the camera he stopped what should I do next?