HELP?

I'm a pretty average person. My grades are average and I'm not crazy good at most of my hobbies. So when I find something I'm good at I hold on to it TIGHT. Therefore I CANNOT deal with it, when people who are perfect at everything have to try to "take" that one thing from me by trying to be better at it. I sing and I have ONE game I'm good at so tell me why Miss giiiiirl has to be miss Smart@ss and tell me how they think they supposedly are in the right when they just started playing it because of me?! I have so little to "brag" about so pleaaase just let me have my handful of talent. 

The same thing counts for Spacehey. My best friend and I are on here because I introduced her to it. One day we just went to the park with some of her friends and she told that one guy about spacehey but spacehey was and still is our thing. I freaked and obviously no one understood why lol.

So tell me... Am I just really jelly for no reason or is this some psychological thing that's caused by some sort of anxiety?