Firstly you do need to be with her on your own or at least where its a bit quiet. Then carefully explain your feelings and wait to see what happens. Happiness is not a for gone conclusion. Dealing with explaining your feelings is difficult but you basicly just need to tell her how you feel about her I am sure you will be fine.
wear bright colorful flowy clothes and wave it around and bend your body into weird positions slowly and graceful like while playing and singing along to barry white. in the background in front of a crowd.... and when you get her attention.. wink at her and with a c0cky smirk say.. "all for you my love"
I would soooooo melt if a guy did that for me.
Grow some frikken balls.
with your voice
just go n tell her
dont tell her dude!! i ruined my relation!!!
just do it
Then you don't deserve her love. No prince charming was afraid of laying everything out on the line for his princess.Good luck with your predicament.
Just be careful with how you react to whatever her answer is. Won't be easy to accept if she's not the one but don't give up, that seems to be what everyone is doing lately.