The golden rule: first mariage then sex. No need to have fear. Why do you want to have sex with a guy who is not commited enough to stay with you for a lifetime? Offcourse he will hurt you. That's why you have fear. Don't want to wait? Than marry him. No need to wait for Mr. Perfect, he won't come around anyway. What makes your mate "perfect" (and the sex with him) is staying together no matter what and working the relationship. There is no easy way out.