I don't see it as a big deal - I have students who drive past my house because they are curious. I would not confess - that seems a bit too masochistic to me, but I don't see this as a big deal.
The legal definition of stalking usually (in my experience of my own jurisdiction and that of others that I have found) requires an element of malice or intentional threat which is missing in these sorts of reports. Curiousity is not malice.