My toxic core beliefs are similar. On some level I believe that I don't deserve to be loved like everyone else. I think that I have to work very hard and open myself up to all sorts of use and abuse to have any sort of old bone thrown at me. Like I have to pay back every small kindness tenfold or the other person will abandon me. Of course the opposite is true - the other person is made to feel uncomfortable and distances themselves and I end up believing that I didn't do enough and so the spiral continues.
I'm working on it. The first step is awareness.