Hi maddnessreturns

You've already gained some very important insights about your childhood, your parents and yourself. Therapy has been helping you understand your childhood and personal struggles. How are you currently managing your anorexia, depression and anxiety?
You wrote your mother a letter to cut off contact. You haven't spoken to her since, but did she perhaps give you a written response to this letter?
I can very much relate to your fears of becoming just like your mother. Many children of BPD parents actually notice certain BPD-like traits in themselves. This doesn't necessarily have to mean they have BPD though. Often it are learned unhealthy behaviors, things we learned or copied from our BPD parent. It can also be certain less than constructive coping mechanisms that might have served us well as a child but not so well in our adult lives. Fortunately these learned unhealthy behaviors and coping mechanisms can also be unlearned or at least better managed through hard work such as the work you are doing now in therapy and on here

Are there perhaps any traits in particular that you recognize in yourself that concern you? For more about this subject I encourage you to look at this thread:
Recognizing and dealing with our own unhealthy behaviors and coping mechanismsWelcome to bpdfamily