Look beyond the emotional attachment and try to evaluate if you actually enjoy being around her. Be objective about it. If you find yourself wishing you were somewhere else doing something else other than being around her, then it's time to get out. It's not going to get better. She's not going to magically stop gaslighting you or suddenly understand your points of view. She's not going to magically heal her deep childhood traumas that cause her to treat people that way. You aren't equipped to help her either. Ask you 10 year old self what he envisioned for you. Ask him if he really wanted this for you. Your 10 year old self would probably be pretty disappointed. Be a man. Be "selfish". Walk away.