should I hang out

So there is this guy I've been talking to a lot and he's really nice when he's by himself but with his friends he always acts like a jerk. So he asked me to hangout with him tonight I said sure but now he is with a friend and says that we'll have to go to his house instead of going to the park and his friend is my ex and he's a really big fuqboi and we were probably gonna makeout and stuff but like I don't want to do it with my ex sitting there what should I do?? (I do really like this guy btw)