Women love these sorts of things, so you can score a lot of points by taking her to a B&B. These trips can be great for weekend getaways.
It's also a great option for all of your travels as you often get a much more comfortable experience in a bed and breakfast. You can usually find bed and breakfast options close to most tourist destinations, and the resources below will help you with your search.
The Bed & Breakfast Channel
This excellent site is very well-organized and is loaded with information about bed and breakfasts all across the country and overseas, along with helpful suggestions. If you search a city, the site will automatically list all cities and towns that are close by.
The B & B section of this excellent hotel site makes it easy to find what you’re looking for.
This site has great deals for bed and breakfast lovers.
Bed and Breakfast Inns, America's Inn Directory
This site lists historic bed and breakfasts and organizes them by region.
This site offers a well-organized listing of inns throughout the country as well as interesting descriptions of the various areas listed.
Bed & Breakfast Inns Online
This guide provides links to inns across the country by region.
Gridskipper.com - Bed and Breakfast
This excellent travel blog is primarily devoted to urban travel, yet they have several useful articles on bed and breakfast options in large cities.
This is a great article from Time about the option of booking a bed and breakfast even in large cities.
NY Times - Bed and Breakfast
Here you can find tons of great stories on bed and breakfasts from the excellent travel writers at the NewYork Times.
Great vacation advice.