A great book that helped my marriage is "The Five Love Languages." It is less about mushy love and more about communication and understanding what speaks to your other half.
As an example, my wife's love language is service. If I buy her gifts, take her on trips, compliment her, etc she is whatever. If I do the dishes, laundry, get the girls to bed, etc she hears a different statement. It means more to her than anything. Some people need to have words of affirmation, or compliments and all the nice gestures, etc mean nothing. There are five such ways to communicate with people.
I would suggest getting a copy for $15 and reading it with her. Women are a mystery in general. This book really helped!
Boo