Warrigal,
It is mixture. Grief, yes, but also "what do I have to show for myself" feelings and, of course, abject loneliness. It can all be a chaotic mire I have to swim through. I am not, per se, depressed. Coming to grips, however, is not the same as it going away. Coping. That is often the mechanism utilized in one's (or at least mine) senior years.
-David-
If it is linked to something unresolved I suggest you try some gesture that helps you come to terms with whatever it is that is troubling you.
Loneliness is the easiest thing to deal with. Join some group where you are being of service to others. I've joined the group that looks after our church garden. It only involves one morning a week and it gets me out of the house, into the sunshine, and I make myself useful watering or pruning the plants, or bringing something to share for morning tea. I find this very therapeutic.
For deeper conditions like regret or grief I have had to resort to more symbolic actions.
My father died when I was only 25 years old. I was married with two small children and I had never been to anyone's funeral before and I was completely shattered by his loss. Dad loved the red flowering gums that are native to Western Australia and I decided to plant one in my garden. I couldn't find a red one so I settled on a pink flowering gum. I planted it in the back garden where I could see it when I was in the kitchen washing the dishes.
The tree grew very rapidly and I discovered that it was a Tasmanian Blue Gum (because of the colour of the leaves) and that it is one of Australia's tallest trees. It grew and grew, and watching it grow gave me a warm feeling and I was able to lay aside my sorrow.
Eventually the roots blocked the sewer main for the houses behind our house, not once, but twice. The tree had to go before it could grow any bigger but by this time I had come to terms with the early loss of my father, and I said goodbye to the tree without feeling further loss.
I had a different problem with my father's mother. Grandma had a sharp tongue, and I had often seen my mother in tears because of it. When I was engaged to be married, Hubby and I went to tell her the news. Without going into details, suffice it to say that her response was rather cutting. I vowed then that I would never allow her to hurt me as she did my mother. I never spoke to her again. She lived to 93, living just across the street from Mum and I was too stubborn to cross the road to speak to her, even after Dad died before she did.
When I was older and wiser I regretted my coldness to her. She had had a very hard life, losing a teenage daughter to kidney disease and two sons in the second world war. Her husband, my grandfather, returned from Palestine in the first world war with silicosis of the lungs caused by inhaling fine sand particles blown by desert winds. He was an invalid for the rest of his life. I began to understand her more and beat myself up for my lack of empathy but there was nothing I could do to atone for my past behaviour. However, Grandma had died, and I had not even had the grace to attend.
Later, in my middle years, Hubby and I went on an extended holiday using an around the world airline ticket. We were away for 5 months and on our way home we had a stopover in Singapore. One of Dad's brothers is buried there in Krangi Imperial War Cemetery. He was killed when the Japanese swept down the Malayan peninsula on the way to Singapore. No member of the family had ever seen the grave, but Dad's surviving two brothers told me where to look for him.
We found his headstone and I placed a Singapore orchid there as I muttered the words, "This is for you, Grandma". From that moment I have been at peace, no longer beating myself up for my past actions. We took a photo and gave one to each of my uncles. Now I feel reconciled to Grandma and I have forgiven her for the hurts her words caused so many years ago.
Why am I telling you this? It is because sometimes tears are flowing because deep inside we are nursing pain that needs to be dealt with. Symbolic gestures can be powerful emotional therapy. For some deep pain a therapist may be a shortcut to understanding where the pain comes from, and how to deal with it.
Everyone's pain is personal. I have shared my experience hoping that it may be helpful, but I have no insight into what is causing your emotional distress. You must handle your situation your own way.
Peace be with you.