C.V.
I read "Codependent No More" by Melodie Beattie. It really helped me to reboot my way of thinking and being.
I also learned about Bowen Family Systems Theory, which helped me to thoughfully examine just why I am the way I am, based upon how I was raised.
I now recognize unhealthy ways of being, can identify where they are coming from, and can fix them. I'm not perfect by any means, but this has helped me immeasureably.
So that might be a good place to start.
Best to you!
C. Lee