You have some good things going for you. You are still in contact. She says she feels love for you. You spend some time together.
It sounds like she needs an emotional connection to you and you have been unable or unwilling to give it to her. That is what my W said too.
I am here to tell you that you CAN learn how to share your feelings. I have done it myself. It has truly been an awakening for me.
If you truly love your wife and want to make it work, you simply have to learn how to do it. Buy a book. Talk to a therapist. Take a course. Whatever. If your W left you because you don't emote, either learn to do it, or accept that she will move on.
Sorry to be blunt.
Me: 54 Her: 50 and sexy as hell M: 32yrs T: 34yrs Bomb: Sept 26-07 "lost our emotional connection" Bomb 2: Dec 25-07 she's "not feeling desire" She asked if she could come home Apr 26-08! Everything's GREAT!