My friend has been dating her best friend for about a year or little over a year but had been best friends before they started dating. He told her everything then eventually they started seeing each other. He put her through a lot he was abusive and was the cause of them breaking up last but she remained friends with him. They were trying to get pregnant but she couldn't after 9 months of trying and she wants to try again with him. He would hook up with women lying to them telling them he wants to marry them and have babies basically mind twisting the women for months. He would tell her about it while they were 'broken up' then she still continues to see him while he was talking to someone else. Then have sex. This is the jist of what she tells me and I'm worried about her. She describes herself feeling 'sickly' and that he is her 'kriptonite' they've dated other people then just get back together. What she says end up back being together. It is unhealthy.. if you have gone through this what is it? Why is he behaving this way and why is she letting him? I know she won't stop cause she doesn't want to loose him.

Because he can! She has to stop letting him hurting her... if she chooses this path and for having to put up with his behaviour then he will never stop.. what is she afraid of losing from this guy? I don't get it!

manga, you hit the nail on the head when you first mentioned that he was abusive. She definitely needs to get away from him but she needs first realize that her relationship with him is unhealthy.