In short, go for it!
What's been stopping you???
Done in the right setting and moment in the relationship it can, dare i say it, "bring your relationship to new heights?" - Cheesy i know... but in all seriousness it should be really good. Especially if your put a little effort into concentrating on why you love her so much and vice versa.
Also, some types are better than others for rolling together alone. I'm not sure which, but perhaps others on these boards can help you out...
But good luck man!
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Who Dares, wins.