Interalia,
I bid you peace.
If I may share something with you, I know the feeling, that of missing someone who has passed on. My dad passed around 20 years back, and sometimes, well, I miss him. Very often it is to the point of sorrow. The last interaction I had with him was a note, written in a very flourished and distraught way, about the lawn I had not mown earlier at his request. While mowing that lawn I learned of his passing. That incident, simply put, cut deeply into my very being. I need to visit my mom. She's almost 70 and lives on the opposite coast.
What others have said, include also the statement about your grove, listening to trees, and from what I know from your posts pertaining to your own beliefs might I suggest, even if in your dreams, seek her, reach to her spirit, find solace for the time you shared.
Brightest Blessings, dear Interalia.
Our lives are short. Love is eternal. While many believe we are all one in the forever after, I like to think we are all one, in the here and now.