Loneliness is a major trigger for depression. I was told that interestingly primarily in teenage and older people. It can feel almost unbearable and yes, can get in the way of a general sense of happiness. It can only be hoped that lonely people can find pleasure in small things and forget negatives for a while. I do sometimes feel lonely, it was the major impetus to join GN, I'm lucky that it isn't a constant feeling and home is not necessarily a negative place. So sorry for your situation wot, loneliness is even harder to bear with constant undermining. I hope you can sometimes find happiness in small things. I'm not at all sure it's possible for anyone to be happy all the time, but it's not unreasonable to seek out things that do make us happy. I've just been watching the birds, it's enough for this moment to trigger the sense of wellbeing I associate with happiness. Yesterday it was sitting in the sun watching the waves. Small things but important.