Boyfriend going on a trip with friends. (M23, F23)

F(23) M(23). I’ve been in a relationship for over an year and a half. My boyfriend is going on a trip with few people (4-4guys and girls) and he only knows the guys really. I don’t know if I’m insecure for feeling that I’m not so comfortable with it. It’s a 12 day trip to a beach. They’ll be clubbing, partying and chilling. I do trust my boyfriend but I don’t trust the people around. What if a girl starts getting clingy and get closer to him. My boyfriend doesn’t know proper boundaries. He’s too nice to people. He doesn’t know when to draw a line sometimes and i don’t know how to explain it. I didn’t mention to him that I’m not super comfortable with this but he deserves fun too. I don’t want to seem like a controlling gf.

TL;DR, I’m not sure if I’m overthinking or if something is there to be said. I can’t sleep at night thinking about how “great” the girls might be on the beach and if they’d approach my man often.