Stefano,
it's really awesome that you made it out of this one, congrats :-)
I don't know, to be honest, if you ever will change your mind. I want to say, yeah sure there's so much good and beauty and love in the world everywhere you look, but actually I guess there's just as much darkness and hatred and evil and indifference as well. I don't know.
I guess one way to deal with it is just hope that one day you will feel differently, but depression seems to feed on hopes and dreams.. I think all I can offer you is try to live in the moment, try to see any amount of positives that you can, even if they are outweighed greatly by the negatives, enjoy whatever happiness you can muster, and live the best you can trying not to fear the return of the depression....