pictures of old friends

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What do you usually do with pictures of you with old friends? Like friends who have betrayed you, talked about you, who were jealous of you, secretly hated on you.. 
I'm trying to figure out if I should keep them. Even though I know our friendship will NEVER EVER be restored I kinda want to keep them because at some point of time we were actually friends, then I think about the betrayal.
Im making this post to know what you did with the old pictures..