Cubby 31682, wecome to the Pet Talk forum.

I do not know exactly what to do in this case, however, you might try placing another litter box somewhere in the house, for him to use. It sounds as though he might be scared that you are going to leave him again. Do you entertain thoughts of changing residence or looking forward to a vacation? He may be picking up on your thoughts/emotions. Cats are very perceptive in this area. Also, you might consider getting him a play-mate, another cat who will be compatible with him, so he won't be so dependent on you for company. Two cats are just as easy to care for as one, and they have a tendency to rely on each other for companionship, when ever you are not around for them.

........wayne