Trauma Bond

3 months ago i left my toxic relationship, i went NC and thought i had been healing but i started feeling guilty i left the relationship and have been missing her. I have been thinking that if i had stayed longer maybe i could have made her change even though it felt like she was getting constantly irritated by my presence. I read somewhere that it i might be in a trauma bond, I just want to know if any other has been in a trauma bond, how they got out of it, and how long it took them.