No, your shoes will not rot if you don't wear them. However, they will start to collect dust and dirt and may become discolored over time. If you store your shoes in a dark closet or box, they may also develop mold or mildew. You can try using shoe trees, shoe racks, shoe organizers, or inserts to help keep them in good shape.
If you have a pair of shoes that you never wear, it's probably time to get rid of them. Donating them to a local thrift shop or giving them to someone who could use them is a great way to clear out your closet and do some good. And, who knows, maybe someone will give them a second chance and they'll end up being one of their favorite pairs of shoes after all. Thanks for reading! I hope this was helpful. :)