It's no mystery to me that you have a LD. The kind of depression you describe would keep anyone from wanting sex. In fact, it sounds similar to what HDs experience when they don't have sex regularly.
I thought about some of the situations written about in Passionate Marriage, by David Schnarch. One in particular told about a woman who had a "block" about certain sexual activities, and when she was challenged to see why she was blocked, overcame it. You might want to read it along with TSSM. I was turned on to it by this BB and it helped me.
Mike - wishing you good luck in becoming a RLNymph