I think my friends are all jealous of how well I dance.
Why do you think that's the case
They get upset whenever I show off
It is good that you have a skill you enjoy doing. You should probably not brag about your skills it might make you look shallow.
Nah, I think I'm going to tell everyone that I have the sexiest dance moves
If you tell them that then they would be really annoyed. I think it would be a better idea to ask them what they think about your dancing first, and maybe even teach them your moves. It would make it look less shallow.