People here making fuss are obviously not proving themselves to be conservatives ones.:S
@poster
Ill tell you something but you need to have a jigra for it.
Here are the steps,
1) Walk to her
2) Ask her friends to step away for a moment cuz its personal
3)If then dont n she tells you to speak infront of them then no worries.
4) Tell her that you're passing out of this institution so you want to acknowledge something
5) Tell her that you have been wanting her as your "committed" partner. (DONNOT mention LOVE) SInce Love is an attachment NOT any sort of crush. And donnot mention girlfriend etc since nice girls donnot like flirty guys nor they like one night stands. So commitment is the deal for you if she is nice and all.
6) Hence you want her answer regarding your proposal as a sincier person/friend etc.
Best of luck! 