What is or was your toxic trait (s) in a relationship?

For me it's codependency and I think it comes from not having my father around growing up. I didn't realize how much that neglect would stick with me in my adult years and into my first relationship, but it did.

It's part of the reason why we aren't together now. But I'm much better now than I was when I was in that relationship thanks to therapy.
What is or was your toxic trait (s) in a relationship?
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