If two healthy people decided together to end a relationship and discussed splitting up items and a date/time for that exchange life would be good. But we are not talking about two healthy people here, one is an alcoholic and you cannot expect “normal” from an alcoholic.
Knowing what I know today I do not think I would be waiting around or using ˝ a picture as any kind of bargaining chip or Geiger counter on what an alcoholic is thinking or feeling. Since you said you would burn it anyway then go ahead and picture that fire in your head and let it, him and the relationship go.