There are some things you will not understand. I think you need to know that. That there are some things only those who are involved in the situation itself will understand. That no matter how much you try to explain to another they will never really get it. That somehow all the words that fall out of your mouth in prose or poem or story will always feel inadequate, like it was never enough. And maybe it is true, because in so many ways these words, these memories and all the time you spent together were and will always never be enough.
You can't measure memory in the present, only the past. And whoever you're telling only exists in the present. The person you loved exists in your past - a secret place now only you can reach, and in many ways that is enough for you, despite everything now.