this book is changing my perspective... anyone read it?

I started reading a book about emotionally unhealthy relationships recently, and honestly… I didn’t expect it to affect me this much. At first I picked it up casually, thinking maybe I’d relate to a few parts here and there. But the more I read, the more uncomfortable it started making me. Not because the book was wrong… but because some of the examples felt way too familiar. Things I’ve normalized for years suddenly started sounding very different when written out clearly. Constant criticism disguised as “honesty.” Feeling anxious before bringing up small issues. Always questioning whether I’m overreacting. Apologizing just to keep the peace, even when I know I didn’t do anything wrong. I think what shocked me most is how easy it is to slowly adapt to unhealthy behavior without realizing it. Nothing happens overnight. It’s gradual. You keep making excuses for the person. You focus on the good moments. You convince yourself every relationship has problems. And because there’s no obvious “breaking point,” you start doubting your own feelings instead. That’s the part I relate to the most — the confusion. Not knowing whether something is genuinely unhealthy or if you’ve just become too sensitive after being emotionally drained for so long. The book also talks a lot about how emotional manipulation can slowly affect your confidence and sense of self over time. That part honestly hit hard. I’ve noticed how much smaller I’ve become emotionally in certain situations. More careful. More anxious. Less sure of myself. And reading this has forced me to look at things more honestly than I probably wanted to. I’m still processing a lot of it, but I think this might be one of the first times I’ve stopped automatically defending behavior that hurts me. Has anyone else ever read or heard something that completely changed the way you viewed your relationship or situation?