if you want to carry on living with him (caring for him) you need regular breaks - can he go off to relatives or friends for weekends every month? can you go off to friends with your child?
if you cannot have a life separate from the black cloud then life becomes more and more miserable - the anne sheffield book has a good chapter on children of a depressed parent - one thing that stands out is the research pointing out they will be more prone to depression in later life - but it can be mitigated if they have "breaks" and lot s of time with positive upbeat people...
it is your choice to stay or not.
yes i get those saying he lacks impetus to get "help" but it is catch 22 - if he simply stopped anti-d's beacuse they "werent working" - then he made that decision andcould have made decision to try something else...
agree with others who say mental illness is not the same as facing cancer etc... also "depression" is sometimes tied up with other elements of personality.
however, if he truly has undergone a personality change (from affectionate loving etc) to a selfish person with depression - then there may be "hope" for recovery..but three years is a looong time...
i also lived with depressed, black cloud negativity....he got worse and worse and literally exploded violently to himself and me adn my son - but in my counselling i also realised he had many personality traits which i could not handle - which i had put down to his depression and excused him...
it is never simple.
the point is you have given it three years. now is time to decide how you want to play it. you have your life, your child has theirs to live.
read up on setting boundaries (eg i will ony listen to moans for ten minutes) on the depression fallout board, think about getting routine and regular breaks from "caring", and spending happy quality time with your child....around positive people. while he can seek support from others....
incidentally i have come to realise that I and what I do have no impact on his depression - he suffered major depression while living with us as a family; now he doesnt live with us as a family and is going thru a depressive phase, saying if only we were together he would be fine...clearly illogical as his major depression occured while we were living together.
whether you stay with him or not - that in itself will neither cure nor cause his depression. sure if you leave he may get more depressed - but it might be what he needs to really seek help...or not...
my ex for example, has not told some of his friends who could help him - he has just dropped off xmas cards from people i know he has seen in past two years - addressed to him and me together. a bit creepy really.
one i have written to (address was in card) to say very simply "we are separated since april 2008,this is my address" if they contact him, support him - so much the better for him.
we = me and kids have so much more laughter and "freedom" since we separated...
you do have a choice in this