I think you played the hand fine. At least, this is how I would have played it up until this point. I check the flop sometimes but you probably do too. A bet certainly has worse hands call, a donkey fishing for overcards, smaller PPs, A5, etc. Also since you lead from a checked BB most people will not want to bluff you as you could easily have a 2.

However, given the way the hand has played out, I think the older gentleman IS bluffing you. I feel like his thinking is that you would CR a 2, and he thinks you will fold anything else. In this situation, I can't let this go. Push now or on the turn, I like now.