I need an advice ASAP.!!! Please!

Hi so im 21 years old and i have a beautiful relationship with my bf for like two years , he's 28 years old, and he has to work and study also but today im asking for some advice, he's gonna travel to Panama just to have some days free from work and stuff with his friends , that is 2 girls and a guy all of them are friends since like ever .. And i havent notice nothing wierd in between them , he is leaving on saturday and before that he wanted to have sex with me something beautiful, idk if i should have or wait until he's back ... How could i know that nothing is happening i hope you can really help me ! I dont know who else to talk to... Advices ? Pls thank you!!