I feel bad for you.....you will find the right woman someday.
I think my propsal was kind of cheesy, but hey it worked. I cooked her a really nice diner and had a candle light tabel set up on my back deck. When she came I had a rose and a card at the front door. The card had a hint on it about our first date (we wasted some time in Bed, Bath, and beyond). Well yada yada she made her way out to the deck where I was waiting and gave her she completes me stuff......she said yes and we ate.
She loved it......thats all that mattered. But you need to do something that fits your relationship. You guys private or social? Romantic? Ask you closer friends what they think since they know the both of you. Good luck and let us know how it turns out.
Eric