Why doesn't my dog sleep without me being home at night?

the reason is because your doggie loves you and want to make sure your home safe and sound, my dog does that he knows the time iget home from school, when iwalk to the porch hes standing up strait wagging his tail barking, he wont stop barking untill ipet him then he runs of to the back yard and sleeps, but theres nothing wrong with him, he treats you like family someone he love because you treat him the same way so he stays up worried for you untill you get home