Yes well done for being on the ball Tetra - maybe put out some warnings about him on social media?
It happened to a friend of my oldest daughter who also cottoned on to what he was up to straight away (I think she borrowed his car and racked up a lot of speeding fines)
Like Bim says the teaching was a good thing to do and you have great references so you sound eminently employable
I'm sure your grandmother wouldn't want you to be downhearted for ever either
Hope you feel better soon