<p>Honestly, just go up and tell her what you have been thinking. Tell her that you understand she has a date for this dance already and you will not push her into a difficult situation (since you aren’t selfish). Explain to her how you feel about her (honesty wins points here) and say that you’re going to give her some space to think about it. Ask her also if she’s interested in going to the next dance with you. Be calm through this situation and don’t use your shyness as an excuse to keep waiting for something that will never happen unless you unzip your mouth and get moving. Worst case scenario, crash the dance in a secret agent suit complete with sunglasses and earpiece, smoothly take her from her partner, and show those fancy moves you practiced in front of the mirror with explosions and fireworks in the background.</p>
<p>You can’t really pretent you didn’t know that she has a date, chances are her friend has already told her of your interest, and even if they haven’t they are likely to if she hears from her friend that you were asking.</p>
<p>Your a senior and she is a freshman. What would her parents think</p>