rbartolo...It must be very difficult without the support of a partner, that said, my partner is starting to realize he is going to have to be a bit more supportive, something he is just not great at!...I think the whole illness "thing" frightens him.
With regards to yourself, I would definitely try another anti-depressant...the trouble is, if you don't do something sooner rather than later, it can get very bad, also you are only 40, still young, so I wouldn't rule out meeting someone, but I do think you have to force yourself sometimes to go out and do stuff.....even when its the last thing you feel like doing.
