Went on Facebook today and someone shared a memory, which was a video of Billy.  In it Billy is being Billy. Seeing it should have brought a smile to my face seeing him and hearing his voice, but instead it was like a knife being twisted in my heart and gut. Seeing it brought back all the happy memories, but that only caused more pain and sadness. Seeing that video basically ruined my day and put me into a funk. I don't get it. Why didn't it make me happy. It gave me a chance to see him,…