Physical & Emotional Abuse Support Group
Abuse is a general term for the treatment of someone that causes some kind of harm (to the abused person, to the abusers themselves, or to someone else) that is unlawful or wrongful. No one deserves abuse, period. Abuse can be emotional, physical, or sexual.
She doesn't have special powers that you don't have to balance your BPD.
Your focus needs to change from her and her lies (including pretending that you are still together) in order to heal and stabilize yourself.
You were SO BRAVE to make it trough the last few months when it was hard. I think you were awesome! That sounds awful and I don't think you are giving yourself enough credit for getting through that mess. You've done an incredibly hard, painful thing and you've done it without the support you were used to having! That's outstanding. You must be a very strong person.
As for the rest, you will be okay. I can tell just listening to you. Just take it in baby steps, and remember that even baby steps are moving you in the right direction. Be patient with yourself. Heal. Grieve. And figure out the new life you want t create for yourself.