Should I sell my PS4.

In my opinion, PC is better than consoles. Not because of some PC superiority thing I have, I just prefer PCs. You have so much more freedom, especially when it comes to modding your saves and stuff. But, hey, that's just my opinion.

As for exchanging it for an Xbox One, though, sure. If you're confident that these friends aren't going to stop talking to you anytime soon.