Jackson does this sometimes too
It makes me sad. He started sleeping in the bed with me at 3 1/2 months of age and about a month ago or so, he started sometimes hopping off the bed and sleeping under it or on the floor! It makes me so sad because I wanted a dog that loved to sleep in bed with me and cuddle - don't get me wrong, when he DOES sleep in the bed, he will be right next to me cuddling but it's getting more and more where he doesn't want to sleep in the bed!