I understand how you feel but I’d try to not see as rejection. When you broke up you told him you were in love with him or falling in love or something of the sorts. Under the circumstances for him to continue hooking up without commitment would be a totally jerky move, plus he’d be using you.

Perhaps he came to his senses after he originally agreed to hook ups. It’s a positive thing that he decided against using you.

What’s he doing with this other date doesn’t matter because no one knows. It could be nothing. Or he could be mistreating her. If that’s the case- poor woman, but nothing for you to be jealous about

I also would look at it as you rejected him. You rejected casual hookups he was offering. Yeah for a brief moment you thought to try again but now you know it’s pointless. So he’s certainly not rejecting you. He has nothing to offer

I understand we can’t control what we feel. But try to think logically so you don’t feel upset about this bozo