A "Different" Bird Problem?

I live in a neighborhood and seem to have what I think is an uncommon (by my experience) bird problem. I have windows around my front door that a blue bird has seemed to taken an odd interest in. the bird has been running into the window almost nonstop for 2 days. I feel bad for the little guy and want to help him. there is a nice sized old woodpeckers nest that he could use, but doesn't, and seems to stop only when there are other bluebirds around or when someone is outside. please help me help the little guy