How should i protect myself from being a victim of sexual assault?

Be careful: There is no way to guarantee that you won't be a victim but there are ways to protect yourself. Be careful who you're with when you go out, have a buddy and keep tabs on each other. Don't let anyone tell you you can't say no at any point. Be prepared to protect yourself, self defense classes may help. If you're meeting someone new, don't have him drive you, drive yourself.

MANY WAYS: First, the other answers are very good! you are never the cause of sociopath acts. Never rush sex or romance. Reality takes time to see. Learn about anyone widely. Does he treat pets well? How does he treat the weak? Are old girlfriends still civil with him? What do your family, friends and girlfriends say about him? Does he consume debasing porn? Drunk? Does he have ability to verbalize feelings?