@ Shongololo
Does it have to be in Europe? Why not do a something like Marakesh or even Dubai? Weather will be warm to in January...
If you deffo must go Europe, then there is lots of places but its going to be cold....so why not do a short Ski trip. Austria, Switzerland are brill (most resorts) and France...you could do the 3 valleys in France where you get the best Apres Ski. Bars, Restuarants, Nightlife..and some of the best scenary ever. I think a candlelight dinner, in a nice restuarant with the mountains behind you and a good glass of wine. Nothing better imo.
Other places I've been to which I would recommend...
Prague
Warsaw/Krakow (I liked it but not everyones liking)
Barcelona
Brussels
Paris
Fabulous place is Reykjavik...wonderful place but extremely expensive once you get there (as everything is imported). But simple fabulous and the missus will love it. Champagne at night, in the natural warm spa pool. Oh yes....
To be honest...maybe half the romance would be going somewhere completely different and trying something new. (and I don't mean bum sex)...