Fishy ? Vegas trip alone ...

So my so works out of town his birthday is today and he turns out to be two hours from Vegas until Saturday so we are on FaceTime and he is telling me how he is planning on going to Vegas BY HIMSELF until Friday night and I’m very upset about it he got mad because he is now wondering why I️ suddenly don’t trust him . But who goes to Vegas by them self ? For what ? He just sent me the info of the rental car room and all and I’m over here knowing that for the next two days I’ll be losing sleep 😴....