Some men (and women) just really like the thrill of the chase.

It has nothing to do with how good you are or how nice you are or how attractive you are or any of those things.

If you act disinterested, he's wanting you.
It you want him, he is not interested any more.

It's tough not to take it personally, I know. Please don't.

I hope I am wrong and that it all works out for you. I just wanted to give you a point of view in case it does not.