How do normal people do it?

How do you get over it, when someone hurts you? Do you shoot a puppy? Do you punch an old lady and steal her purse? Do you wear meat instead of swimming trunks when your in shark infested waters? How? Because I honestly want to get this over with. I wish I can get over a girl easily, like my cousins. They sleep around a lot, but they don't get hung up on a girl. They don't get hurt if the girl dumps them. They miss sex, and thats the one thing I don't want a relationship to be about.