Based on what I read from your post you were in a potentially life-threatening situation. Is it just that you've broken up with someone and you're incredibly unhappy?
You broke up with the first guy for a guy who ended up abusing you, is that right? Is there any chance that guy1 would consider taking you back if you came back contrite and made a very heart-felt apology? If not, then you have to learn from your mistake.
A relationship (with very few exceptions) takes time. How long were you and guy1 together before you threw him over? Did something happen to cause you to seek comfort with guy2? If so, if this ever happens again, be careful of what you wish for because it might come true. There's no law that says you have to have instant chemistry with a guy.
The basis of a relationship is friendship. Everything good takes time, and if after some period of time, you realize you want to be more than friends with him then don't let anything stand in your way (unless he doesn't and then you may have to move on). If you decide that you don't want to get emotionally involved with him the worst thing that happened is that you made a friend.
I'm sorry you're hurting--sometimes the best lessons are learned the hard way.
Good luck and keep posting.
Camille