Should I be worried?

Okay so my boyfriend has planned a trip with his 3 friends to go to Montreal to

Drink at bars and go to a convention. I was okay with it at first but it seems it’s all he talks about cause he’s super excited to go. I trust him a lot but yesterday started saying things like “ my friend is gonna say that I cheated and stuff cause he thinks you’re no good for me” and obviously it hurt cause his friend is normally very nice, quiet and keeps to himself. He’s even walked me home from work (we work at the same restaurant) it just seems so weird for my boyfriend to say that as if he’s gonna cheat and then say his friends gonna say it as like a cover up so I believe him ?!? Idk I need advice what should I be thinking:(