How would you feel?

So my boyfriend and his ex are like really close and good friends. My boyfriends friends are camping out in the woods and my boyfriend wants to scare them with his friend Pat and his ex. Pat is camping with the other friends and will help scare them. So in order to scare them my boyfriend told me he’s probably going to have to spend the night at his ex’s house. He didn’t really ask if I’m ok with that or anything but I really don’t know how to feel. Like I don’t want to tell him that he can’t spend the night but then I don’t really want him to spend the night because like I said before, they are super close.