I think something is going on with my friend and I don’t know what to do. Through time she’s been slowing changing. For the past couple of years, she’s been dating a bunch of different guys and has cheated on a lot of them. During this time she had a not so great family life. She started drinking a lot. Then she met a different guy who she dated for a while and moved away with.
She told me after they broke up that he had been verbally abusing her, he was into hard drugs and they had been drinking all the time together. Now she’s on and off with him and dating a few other guys and drinking. I get the feeling that she’s using this as a way to cope and I don’t know what to do. I wanna help her but I don’t know how.
LemonVibe 
I would do some research at http://al-anon.org to see more as a friend of what you can do. Most of what you can do is listen to her when she needs to talk and offer to listen. Let her know that she has a friend and a safe place. She most likely needs professional help, but you can steer her to that when she’s ready, but not before.