Amazed About This Situation

So I ended my relationship of three years a year a go.

my ex didn't stop contacting me till about two months ago. Now I found out he was seeing a girl a month before we broke up and next week they are going to get married. We had contact yesterday and he was talking about the fact he was seeing some girl and yeah they live together but he dreams about me every day and he wants me back because he doesn't love her and that he broken up with her over the weekend and that she moved out. I heard he was getting married by somebody else and I did not mentioned this.

he kept on going that I am the one and she is just a fling. a fling?

Well he is still going to marry her next week and the reason mainly for her is t get a visa/passport.

I was engaged to this guy not only over a year a go.

it's weird and it hurts...

is this weird? what should I think about this?