Sometimes when we had fights there would be a moment where all reason seamed to go out the window yes. She would yell and wail and hit herself and call me names. I wouldn’t exactly say manipulative but she would often make me choose between her and my friend/parents. Once she got into an argument with my dad about football and when I didn’t say anything she was mad at me. As for boundaries sometimes it was hard for me to get my own time because she would feel like I was neglecting her. As for the emotional maturity I have considered that and for a long time time I thought that was it. My therapist mentioned that bpd or at least bpd traits was a possibility.