What am I?

Feeling like I don't mean shit. I just wonder if I've ever made any difference in anyone's life. Without me, will their lives be any different? If yes, is it a "good" kind of different or a "bad" one? Or how 'bout just no difference at all?

Because then maybe I'm better off OFF the face of this earth. Sometimes, my mum tells me things that make me feel like I'm a burden. Not a daughter, but an inconvenience. One that might be better omitted.

Then it leads me to another thought: If my physical being were no longer around, can my spiritual being stay wandering around to take a good look at all of your lives? Watch how all of you grow old and feed on your miseries while your happiness eats into me. Now that, sounds like a mighty fair deal.