Why do I always think about people? Why do I always afraid to hurt them? to say something they don't like?

Why do people don't give a damn about me ?
Why they don't afraid to hurt me?

Have you noticed that sometimes we can't reply back in a rude way? We can't do something we want, because we are afraid we can hurt somebody?

sad, grunge, and happy image

I've been hurt a lot. And despite that I am still afraid to hurt somebody, even they don't .
Why do I do that? It's so annoying... Maybe I am weak. Maybe it's a real definition of weakness?
Or maybe its my strength. The gift I have deep in my soul.
Maybe I'll be rewarded for it later.

So how do we call it ? Strength? or WEAKNESS?