Why do i keep going back to him and wanting to be his friend ?

Try to take the focus off of him and put it where it belongs. On you!!!! He knows which of your ons to push to get the desired reaction from you. It's like he is treating you like a puppet. Cut the strings. I know it is easier said than done, but no one said it would be easy. Every time you think wow he's so nice - force yourself to remember the bad things he has done. Focus on why you deserve more. Remember you have to look at yourself in the mirror every morning. Do you want to see someone with a ring in her nose being lead around like a dog or someone who knows herself and loves herself and took the time to force herself to get out of a bad situation? You can do it.