I was in the same situation when I was 14 or so. A man was following me with his car for at least 15 mins (which seemed like ages). The first house I saw I acted like it was 'mine'. I opened the gate, took my bike and parked it against the house and walked around the house. I waited for a good 15 mins and the guy was gone.

that was ofcourse long before cellphones excisted.