sometimes the wind's blow us in different directions and blow's away the connection that was there.
We take on different roles in our lives....lover, wife, mother.....and more then often when our priorities change we see things with a heavy heart.
Can you remember what bought you 2 together in the first place?
FWIW, I think many of us go through this in our marriages...doubt creeps in, repulsion, dead end feelings. You might need to see if you think its worth saving honey
your an incredibly strong woman...maybe its one of the reason's DH cant see what's wrong