I feel bad for you
Have you been to a doctor to rule out anything physical? If it's not, try talking to a psychologist.
I hope you work it out.
Hrrmm... You said she has to work rough on you. Maybe thats part of the problem. You may have took some sensation out of yourself. If that makes sense. I dont think I'm explaining it very well
Ive heard of that before... Guys being too rough, and then thats what they are used to.