Hey lax, Welcome! Many of us have been in your shoes. We get it. You're in a familiar quandary.
i am affraid that he ll try to hurt me in many ways, and also that he will always come in to my life and thretans me about things about my daughter.
That's no way to live, though I can appreciate that he is using fear as a way to control you. As you may know, those w/BPD use F-O-G (fear, obligation and guilt) in order to manipulate the Non. It helps to be aware when you see the F-O-G rolling in. Don't fall for it, is my suggestion.
Hang in there,
LuckyJim