The good part is you're been yourself, you don't have to imitate anyone to please anyone else you lose yourself to a fake life.. If you really want to get her,walk up to her and tell her..

Look responsible, act matured and don't compliment on unnecessary things or lustful things on her body...

Try to keep cool and always be neatly dressed

Don't act around her and don't secretly stare at her...
 Always put up a smile and if you want to stare at her.. Make it obvious and fixed gaze..

Since you're the shy type, mingle abit with her friends as an opportunity to talk to her..

Don't text love messages or letters.. It makes you look immature or weak.... Make her know your intentions and don't stammer when talk. Always take deep breath and talk one at a time