There are a few things you can do to keep hush puppies from falling apart. Firstly, make sure that you form the patties correctly and do not make them too thin. Secondly, be careful not to over-fry them - this will make them crispy on the outside but dry and crumbly on the inside. Finally, add a little bit of cornmeal to the batter - this will help to bind the ingredients together and make for a more cohesive hush puppy.