This is a huge breakthrough. So if you are going to stick out this relationship, be prepared for a lot of work. Even if you can identify and fix the lack of desire problem in her, there are tons of other issues at play, and half of them have to do with you.
So check into any physical problems, then do some serious study as Lil suggests with her book. I would also put Shnarch high on your list as well as some books on codependency (for you) and start to look into both of your FOO issues. I think you both seriously need to get into counseling too. The good news is that you two may be able to work through these things faster than others here who have been stuck for years and built up lots of resentment.
Do not even THINK about marriage until you two what worked through a lot of this stuff. Otherwise you will both harm the innocent children to come.
