Most Helpful Guy
That sounds like "You're hot and I enjoy sleeping with you and you're fun to hang out with, but as soon as something I like better comes along, I'm gone." So... yeah, it's okay to be upset. And if you don't want casual dating with this guy, that sounds like a good time to break up.
Most Helpful Girl
Well honestly, it's really up to you. No one really knows their future with someone, I had 3 boyfriends in the past and neither of them was future worthy ( marriage wise ) . But you will never know he might change his mind, if I was you I would stay and see where it goes, but once again, you should go by how you truly feel. By the way, it's nothing wrong about being upset, and just because he says he doesn't see you guys together doesn't mean he doesn't love you.