I honestly don't know. It was bought along with a couple of other truckles of different flavour cheeses and for some reason it was left forgotten at the back of the fridge. I just noticed it there this morning.I would eat it, I love cheese and can't imagine why you didn't eat it years ago.
Go for it, its "best before" but you could be finding out if its "even better by". Go to cut into it and see if its lunges away from the knife and shows forms of communication.