Dear Dingo,
There are some previous threads here in this forum that talk at length about all the member recommended restaurants in Asheville, just go back to the forum, and in the bar just above it, click on "Search this Forum," and then type "restaurant" in the search window, and they'll all come up. You can also go to the following website for lots of ideas:
Asheville North Carolina Travel & Visitor's Guide
Now, if you have a whole lot of money to spend, that is, more than $500, you can go to the Grove Park Inn, they have a trolley to downtown, plus they have specials for Valentine's Day, here's the link:
The Grove Park Inn Resort & Spa - Packages & Specials
I personally like eating at the Weaverville Milling Company (just north of town, kind of out of the way), and also the Tupelo Honey Cafe and Cafe on the Square (both downtown). For example, if you were to wing it and eat at Tupelo, you can then go the three blocks up to the Thomas Wolfe Auditorium for the Asheville Symphony evening concert "First Loves" for Valentine's Day, and a nice (expensive) place to stay between the two is the Haywood Park Hotel. Or you could eat at the Cafe on the Square (sit in the front part, at sunset is best), and hopefully there will be a good movie at the Fine Arts Theatre just a block down on the same street, and the place to stay is diagonally across the Square at the Renaissance (get a higher floor for the views).
I do know there's a brand new hotel in Biltmore Village, which the village has lots of interesting shops and restaurants in old-timey houses, and I think the hotel is called the Bohemian, but I don't know anything about it except it's pricey. Lots of people also like to go to the Biltmore Estate, right across the street from the Village, costs I think about $100 for two people to get in the gates, and they usually do something special for Valentine's, I think.
Now, these are what I call "formal dates" info. Others can tell you all sorts of stuff to do if you just want some outdoor fun plus a lunch or something like that, maybe Llama Trekking might make a nice picnic adventure, I think they have a group up in Maggie Valley or somewhere like that, then there's skating at the Civic Center downtown, they have a schedule of when you can do that, and might be fun to try that movie theater/brewing place on Merrimon Avenue...I'm sure you could do a google search for that, cuz I gotta go now!
GG