Should I be worried? 🤔

My boyfriend of seven months is going to a six day camp where he'll have no way to communicate with me, as they take their phones away while staying there. I'm okay with that. What I am not okay with is the fact that this girl that he used to like and used to like him will be there too. They met at the same camp last summer. I'll have no clue what's going on with him while he's there, which bothers me. I don't think he'll try anything, but she might. As I tell him "I trust you, not these other girls." His cousin will also be at this camp so she'll tell me if anything happens but still. It's stressful. The girl messaged him last night asking if he was going and he said yes and asked if she was too and she said "yes! Omg!!!" I don't like other girls getting that happy about my boyfriend. 🙄🤔 I'm going to talk to him about it and try not to sound like a crazy girlfriend but I'm worried. I'm very insecure sometimes because he can do so much better than me. 😔 Anyways, what should I say to him when I talk to him about it? If you were in my situation, would you be worried?