I kind of like him. And he asked me out. But he's a friend of my ex (who I never want to get back with and we don't even talk anymore). They are "close" friends but not "best" friends. I have no idea what that means because to me those two terms mean the same thing. He kind of backstabbed his friend (my ex) by putting him under a negative light whenever the topic of my ex comes up. Do you think I should date him?