It's odd, I don't feel that not being in a Relationship is a handicapping. Nor do I think others find me important or that much of a threat they need to damage me in someway.
I just don't rate myself as worth the effort. It takes time and effort to hurt someone.

I did used to make myself physically sick by thinking and over thinking about conversations and situations I had been in.
It took A while for me to realise this was me and ocd that was hurting me.
Not allowing myself to move on and let it go.
It's Not that other people don't get hurt, they just were just better at letting go than me.
It took A long time to amend my coping mechanisms.

But it can be done. I still prefer my own company but not because I feel threatened by the outside world, just because I am pretty content as I am.