Maybe some one in your neighborhood is home during the day, perhaps an elderly person that will enjoy the companionship, and perhaps will be more than happy to take care of the dog as an exchange for yard work, house-sitting or odd jobs. All of these options are possible, but it is very important that your dog is a desirable companion. This means that the training and obedience is very important at least training in the basics. Maybe you can form a nine to five dog owners' network and exchange ideas with other owners. Just remember a dog is not like a toy that you can pull off the shelf whenever you want to play and when you are done stick it back on the shelf.
Dogs are a responsibility and are loving creatures that have needs of their own.
So do everything you can to make your dog happy and you will find that it relieve you of stress and anxiety on your trip home from work.