I want to open my relationship just for this one trip?

I've been dating a guy for 3 months, and very quickly we realized our spiritual connection and couldn't be more compatible or perfect for each other. To give a sense of how fast things are moving, I've already gone out with his parents twice.
On the other hand, before we got serious I had planned a gay spring break trip to Thailand with my friends - he couldn't make it due to work commitments, but I was also conflicted about whether I wanted him to come. While my friends will be presumably getting it on with hot Asian guys, I couldn't decide whether I wanted to do that with my bf (who is easily hotter and fitter than me), or have one last slutty hurrah before settling down. I'm barely above average looking, but have had a lucky record of attracting super hot guys, and before meeting my bf I was mentally prepared for a slut phase before my next relationship. I didn't think I'd meet "the one" only 8 months after breaking up with my ex.
My bf is super open minded and is actually ok with me doing other guys, as long as the guy is hot and I tell him everything. He said he won't want to deprive me of an experience. I'm not as ok with him being ok with it though, because it'll open the door to him doing the same lol, and I'm not into open relationships. So I insisted that I won't touch anyone beyond just dancing, even if i wanted to, because I don't want to risk our relationship in any way.
But as the date approaches, the idea of having to behave myself seems... stressful, especially after the promises I made. After a lifetime of looking down on open relationships, I'm starting to feel a bit hypocritical
On the other hand, before we got serious I had planned a gay spring break trip to Thailand with my friends - he couldn't make it due to work commitments, but I was also conflicted about whether I wanted him to come. While my friends will be presumably getting it on with hot Asian guys, I couldn't decide whether I wanted to do that with my bf (who is easily hotter and fitter than me), or have one last slutty hurrah before settling down. I'm barely above average looking, but have had a lucky record of attracting super hot guys, and before meeting my bf I was mentally prepared for a slut phase before my next relationship. I didn't think I'd meet "the one" only 8 months after breaking up with my ex.
My bf is super open minded and is actually ok with me doing other guys, as long as the guy is hot and I tell him everything. He said he won't want to deprive me of an experience. I'm not as ok with him being ok with it though, because it'll open the door to him doing the same lol, and I'm not into open relationships. So I insisted that I won't touch anyone beyond just dancing, even if i wanted to, because I don't want to risk our relationship in any way.
But as the date approaches, the idea of having to behave myself seems... stressful, especially after the promises I made. After a lifetime of looking down on open relationships, I'm starting to feel a bit hypocritical