Your only chance Neo is to follow Marty's advise.

Come clean and gamble with everything you've got - what have you got to lose right? Probably not much.

Go for it - give it your best shot. Make a fool of yourself (not a jerk) in a funny, romantic, sensitive way and she'll either walk, which means you can sleep at night knowing it was not meant to be, or she'll propose to you and be on the next flight over.