How about you? Have you tried to engage in therapy for yourself? It sounds like you are hopping from being a codependent for one woman to now another. It would be beneficial for you if you saw a therapist for yourself so you can dig into how you may be unknowingly falling for the wrong kind of partner and work on "yourself" before jumping into another relationship where you take on the same role playing that ends up making you miserable. If you are in a new relationship with a woman who has the challenge of borderline personality disorder you will end up becoming a punching bag while she works out understanding the depth of her challenge. That is a lot to deal with and could prove to causing you to endure a lot of stressful toxic interactions where you "are" walking on eggshells.

Walking away from a challenge like this doesn't mean you are a bad person either.