Hi, I'm new here, and I really didn't know where else to turn.. I need some advice about my new relationship..
I went through an abusive relationship when I was 17, where I was physically and mentally abused for 2 years. The guy also cheated on me constantly throughout our realtionship, and even slept with one of my 'friends'. When I left that situation, I was fine for a long while, really strong, and dated a bit but never fell for anyone. I met someone else after a while and it became pretty serious. I fell for him, and it was very difficult to trust him, and I'm not sure I ever did completely.. but the mistrust was justified - he cheated on me also, and was also a member of loads of dating websites and he lied to me a lot.
I got over this (or so I thought), and felt okay again. Recently, a good friend of mine and I kissed - and it developed into something really special. He's amazing - everything I could ask for in a boyfriend. He's trustworthy, he's open, he's not afraid to commit, he's kind, considerate, understanding. He's done *nothing* to suggest that he would hurt me, in fact I know deep down that he wont. He's perfect.. it was all just so perfect...
But in spite of all this - I still don't trust him. I'm always checking up on him, questioning him, reading into the things he says, obsessing over his previous partners, creating arguments with him for no good reason. I sit and think about his ex's, picture them together, and I always think that he's thinking about them. I flit from one problem to another, and I feel uncomfortable when things get too nice between us. He keeps saying that I seem to have forgotten who he is - when we were friends I trusted him implicitly, I told him everything - and I was even like it at the beginning of the relationship. But the more I fall for him, the worse I seem to get. Sometimes I break up with him just so that he gets upset and I know that he really cares. I'm really horrible - I make really sarcastic, horrible remarks. I'm not a nasty person- but I feel like I'm 2 different people.
The worst part is, is that I've also started to self-harm again because of it. It was something that started when I was with my first partner (the one who was violent), but I had been really good since then. But I can feel myself slipping. I have less and less motivation, I don't want to get out of bed. I feel sick all the time and I just don't want to be happy.
I know that this isn't HIS problem. I know the problem lies with me. I just don't know how to overcome them. I have borderline personality disorder, and I go to therapy for that, but it doesn't help. People don't seem to understand that I need active advice.. something I can do directly to stop it happening. I know I can't carry on like this because i'll drive him away.. and I'll never forgive myself if I lose him because of this..
Please, does anyone have any advice

.. I'm really at the end of it, I don't know what to do..I really need some help..