Sweetie, I can certainly identify with you. Been there, done that.
Have you gained some insights into your attraction to the bad boy thru any type of counseling, reading, or group work? I've done a lot of studying, reading, and self-examination about this myself, including counseling in the past. Never had a satisfying relationship with a man that lasted. But I'm much older than you, and I've finally found a peace from making my way solo. However, if I were your age, I'd seek out answers to why??? I'd try to make behavior modifications that sent me in the directions of healthy relationships, if you truly want that.
Love,
Patty