I understand your fear. My EXAH was possessive, jealous, and toss in violent with the mix.
I gambled that moving over two hours away from him would pay off as he was strung out, plus he had cheated on me several times, and I hoped he would find another woman to latch onto.
My gamble paid off. Fortunately I did not have children with him.
Welcome to SR, and know that you are among friends!