Not all memories aren't happy... Like the happy memories of my ex-wife which are now a tragedy to me -- that everyday Facebook wants to remind me about. I don'

Not all memories aren't happy... Like the happy memories of my ex-wife which are now a tragedy to me -- that everyday Facebook wants to remind me about. I don't use facebook much. There should be a filter button such that I can say, "I don't want to hear about this person anymore."