Im not confident in , please help !?

alright, so I am in a relationship at the moment and we are a very flirty and cute couple (i think) ... and when we get really close you know what happens :) ... i wish i had the confidence to be the one on top and flaunt my stuff.. you know ? .. but i just don't have any confidence at all to do that.. what do you think i should do to get more confidence in ual to make it more fun and wild .. (( i know it kinda sounds a bit funny )) .. but help! how do i get more confidence.. any ideas?