Hello, I'm so sorry for your loss.
It is difficult to find the words that express the right level of emotion, when outspoken love has been lacking in any relationship. I'm sure that you will find the right reading in time but here are a couple from me. My own preference would be for the Miss Me but let me go, but the other, Even such is time, might resonate, particularly if you are to be having a religious burial.
In either case, having lost my Mum earlier this year, I send my sympathy.
Miss me, but let me go
When I come to the end of the road,
And the sun has set for me,
I want no rites in a gloom filled room
Why cry for a soul set free?
Miss me a little – but not for long.
And not with your head bowed low.
Remember the love that once we shared.
Miss me, but let me go.
For this is a journey we must all take,
And each must go alone.
It’s all part of the master plan,
A step on the road to home.
When you are lonely and sick at heart,
Go to the friends we know,
Laugh at all the things we used to do.
Miss me, but let me go.
Anonymous
Even such is time
Even such is Time, that takes in trust
Our youth, our joys, our all we have,
And pays us but with earth and dust;
Who in the dark and silent grave
When we have wandered all our ways,
Shuts up the story of our days;
But from this earth, this grave, this dust,
My God shall raise me up, I trust.
Sir Walter Raleigh, explorer (1554-1618)