dont ask a guy out! this is the reason why girls have such a bad reputation, im sorry but its true. Personally i think girls who ask out guys look desperate.
Try leading him on, so HE asks YOU out, not the other way around.
And nothing wrong with the age DIF. im 14, a freshman in high school, and my sister (16, junior) well her boyfriend has a friend also a junior and is setting me up with him bc we're exactly the same. so hes a junior and im a freshman, nothing is wrong with that.
but u should let him ask you out, lead him on, flirt, dont say "i like you" or anything like that,
just lead him on