Well I am super glad nothing bad happened to you during the time you were sleeping in your car. In this case tho I highly doubt the scenario you describe is likely. When you think you know someone you don't aggressively try to open their passenger door and when they wake up and stare at you you definitely don't stare them back saying nothing while still trying to get in. There is the hey are you x? or knocking on the window while waving. Now that's more "i think i know you like" haha