I'm not

I'm not a sister anyone would want.
I'm not a daughter anyone would want.
I'm not a niece anyone would want.
I'm not a stepsister anyone would want.
I'm not a friend anyone would want.
I'm not a thunder buddie anyone would want.
I'm not a shoulder to cry on.
I'm not someone for a hug.
I'm not an ear to listen.
Everyone thinks I am these things but I'm not.
I'm a bad person.
I know no one is perfect but that nothing for me.
I'll never come anywhere near perfect.
So why dose everyone love me?