I'll give you my example.

When I met my fiance, I was super cool, I was very fit, and a little cocky. I didn't need her. In fact, she would chase me. She would text and call me all day long. I wasn't sure about her and she would chase me like crazy.

Slowly I turned into a needy, weak, submissive man over the years. I changed alot. I became fearful of losing her and I did because I didnt keep her attracted. I tried to fix all her problems so she would "owe" me and not leave me. I would rescue her to prove my worth.

Basically I lived in fear. And fear is the opposite of attractive.