It’s really a shame to have to throw them away, unless your moving or downsizing and they absolutely have to go - nice trips down memory lane and even if nobody else wants them they’re yours and they’re not hurting anything. Try a compromise, go buy 3 or 4 of those big blue plastic tubs, dust the forms off and stick em in there and place in a corner of the garage, then go inside and sincerely offer to help clean out all of the kitchen cabinets and anything else that might need it, i.e. create a major distraction until they can be safely stashed away – GOOD LUCK !
