How to know if you're a good dancer and choreographer?

I'm 16 and I started dance at the beginning of my school year (15) & I fell in love with it! I've never taken classes just school dance but I'm really good at picking up the choreography and I want to know how do you know if you're any good? Is there anything to determine that? Another thing is how do you know if you're a good choreographer? I can hear a song almost any one and movements just flow out of my body I don't know how to describe it, it just comes out. Even when I'm listening to a song it's like the whole dance flashes in my mind and I copy it exactly. I'm not a person who's taken dance lessons before. Is it possible that it's just my love for dance? Or does anyone who dance go through this?