I’m going to Italy in 3 weeks and get creepy vibes from a guy

So I’m 3 weeks I’ll be in Italy with my school grades 10-12. I’m grade 10.

We have been having dinners and stuff to all get to know eachother because we will be away for 16 days.

I have been hanging out with the two grade 11 girls and the grade 11 Boys (I go to an all girls school so we are going with our brother school. There are 5 girls and 15 guys going... no girls in my grade are going)

Anyway I have been talking to this guy josh but last night at dinner (it was a group dinner) I just for some reason got creepy vibes. I don’t want to sound paranoid or anything but I just feel like he would be the person to kill someone or me in my sleep.

I know that’s a big statement and claim and honeslty I am probaly just paranoid but I’m just worried about it. Should I do anything or just leave that thought????