I've had to really work on this. I used to think that if I was kind to someone they would be naturally kind back and when they weren't it hurt. This mostly happened with girls that I wanted to be friends with...now I'm still nice, but super-picky with who I choose to let get that close.
All dreams have to scare you. Mine are to be a NHL player, it scares me to don't know if i'll be able. To make parachute, it scares me but next year, i'll jump from an airplane because it's ONE of my dream.