I live with a dog who was the most terrified animal I've ever seen. He still has his fears 4.5 years later. Living with Iker has been one of the most rewarding experiences of my life.
You're not being selfish. If it's ok, I'd like to share with you some of the things I've learned.
1. Keep a sense of humour, you'll need it
2. Patience, patience, patience.
3. Don't force anything.
5. Keep smiling
6. Try to walk her with other dogs when possible.
7. Accept your dog for who she is. You may never be able to take her on good walks, but you still gain a lot by living with a loving family member.
Iker is afraid of walks, too. I've done several things to adapt: I walk him during off hours, I walk him on quiet routes and I don't baby him. Eventually I figured out that he was terrified of the route we'd been taking; I changed routes and things improved.
The most improvement came after I adopted another dog, and let Iker choose the new family member.
Try looking up Debbie Jacobs' website called Fearful Dogs. I had a Skype consultation with her, and you wouldnt believe how helpful she was.
http://fearfuldogs.com/
Good luck and do whatever you think is right.