Why do I feel like I’m carrying trauma/baggage that isn’t even mines?

I was with a guy for three years. He was abusive in every way you can imagine. His child hood and adult life was a mess compared to mines. He dealt with sexual abuse from his own sisters. A mother who he didn’t like much and I could say she didn’t like him much either. His family was entirely toxic. My family isn’t perfect but we weren’t/aren’t them either. We have some stability so when I was with him and actually heard, saw and experienced what his family was like it made sense to me why he treated me the way that he did. Why he was the way that he was. He had no peace because his family had no peace and it was almost like I was the peace and he stole my peace from me. He had major trust issues. Everything was suspicious to him. Everyone was out to get him. Even his family (in his mind). I got the courage to leave a year ago but I realized I’m not the same person. I got away physically but on the inside, sometimes I feel like I’m still there with him. I feel like I took on some traits of his/his family in a way. I’m not abusive but I developed trust issues. I developed suspicion and extreme anxiety. I found myself questioning the intentions of people that I love the most. I find myself suspicious of things about them that I shouldn’t be suspicious of because I know them well enough to know the truth about them despite what my suspicions say and this all came from being with this guy. I’m healing from that relationship and overcoming it but I never realized how true and real a situation like this was until I started to experience it.

Why do I feel like I’m carrying trauma/baggage that isn’t even mines?
Post Opinion