You get a new classmate, he seems very lonely, but after a while you realize that he is a playboy. He is very mean and cold, he usually sits with the popular children but he stares at you more often. After a few days he goes to you and talks to you, you think he's weird and walk away from him, but he doesn't give up and keeps trying to get your number. You think he's not so bad, you start dating, a week later you see him Smooching with another person...

You asked him about it...