I have the same thought--long time since I've laughed about anything. Not many real smiles, either. I can't read much anymore either, like a novel--can't concentrate well-- and I used to love that more than anything else.
Another thing now that makes me sad is that when I dream at night, in my dreams I'm normal again, not depressed, and I feel so wistful about it when I wake up. Depression is the worst illness, for sure. I wish recovery for us all.