PLEASE READ THIS: I WAS A PREGNANT UNWED TEENAGE MOTHER! The "pull out" method does NOT work because of pre-ejaculate! The only sure-fire way of not getting pregnant is abstinence. Next, birth control pills. There are many other forms of birth control which you should be using if you're sexually active. If you're old enough to do adult things, then you're old enough for the responsibility & consequences of your actions. If you're not, then I suggest you rethink this. I say YOU because you'll be the pregnant one. Besides that, why are you having sex with friends? If he's truly your friend, then he'll still be your friend even if you don't have sex with him. Sex is serious business, not a light social activity. I'm really not trying to be harsh, but I don't want to see you go through what I did. Please make some changes before it's too late.