The problem with the blunting is that it is also an effect of the depression. I have it and am not sure what cause's what.
I love my fiancee but feel very little love for her. It is not that I fell out of love as this holds true for everything and everybody. My niece gave birth a few months ago and I felt nothing!
I love my niece as one loves a child of their own and this blunted affect hurts.
I have recently started to feel a little better and I owe this to the longer days and a lifting of my depression. So, in my case I think it is the depresion that cause's my "blunting"
Good luck and God bless
Glen