Blu-tac man: a delicate situation...

Emmm... so how do you tell someone that they haven't been invited on holiday?

I was in town this morning getting some last minute things for my trip to Crete and returned to find blu-tac man all set for the road, with his suitcase packed and his sunglasses on. He must think he's coming with me, I don't know how I'm going break the news to him that I haven't bought him a ticket...