Dealing with losing my 7 year old son to Brain cancer

Dear Charlie, I don't know why I didn't do this earlier, I wish I did, I find it hard to say my feelings I'm so frightened I will forget things I don't want to forget anything at all, today I thought about when Mr Germaine came over to do your sisters nursery home visit and you were so happy to see him, you were looking forward to him coming and he gave you a high five. I felt bad he left as Patience the health visitor had turned up and she was wanting you to be healed. I often think about how tall you would be now. I miss you. Today your littlest sister has been saying she wants you to come home. It's very hard for her to understand.