Kelly,
I only know about me. And in my case I do know that I have always held relationships at arms length. I have a difficult time committing 100% and I think that is because I don't want to be vulnerable. Is that because I am the child of an alcoholic? I have nothing to really compare it to But I suspect it may have something to do with the fact that my father left the marriage and me when I was a teen.
I hope someone else comes along and shares thier experience.
Hugs,
JT