I had a similar situation except it was an older man from my out patient therapy. He pretty much did everything this guy is doing including showing at outside my childrens school. Do call the police. I did when this was happening and they paid him a visit and told him to stay away from me. And he did for five years till he tracked me down on facebook even tho I don't use a real name on there. Tried to add me as a friend through his wifes facebook account. Creepy to say the least. But call them and see how they can help. He ovbiously is not taking no for an answer.

I am sorry you have to deal with this but keep safe and maybe try not to walk around near your home for a while. I hope he backs off or that the police will interviene.

You are not being paranoid.