Yes thanks.
Seeing my friend in hospital has helped me come to terms with his problems. I suppose it was my inability to help him that pulled me down, I hadn't realised just how much he means to me, probably my only true friend. The sort of friend you could rely on totally.
I was also being stressed by a couple of family matters, one has now been sorted and I have accepted that the other is beyond my control and it will sort itself for the better regardless.
Having had depression for many years I now know that whilst I can fall into a dark place very quickly, I will always crawl back out, usually takes a week or two.