Can you volunteer at an animal shelter? Chances are there will be injured dogs who need a place for convalescence and that way, the shelter would provide the food and veterinary care. You would eventually have to give the dog back, but the more pets you can take care of and love, the more animals will be better adjusted for adoption. It'll break your heart every time, but love hurts. The more you allow yourself to experience the emotion of loss, the better you will understand the good you're actually doing. I hope you are able to find some arrangement that allows you a pet between now and the time you can have your own dog.