To OP, I run across this now and again. Make a note that he shows a lot of bluffs, it is a sign of an inexperienced or immature player. This info can come in handy if you encounter him again.
I may show - stress MAY - if the situation calls, as one example. if I have been stealing a lot, and get 2-3 monsters in a row, and people are folding to my bets, I may show to keep some stealing credibility, but 999 out of 1000 I wont.
If I have been stealing and get 2-3 good hands after, I may try to get a caller to go to showdown by giving decent pot odds
on my bet (only if I think I am ahead), so even if I read wrong and lose, my stealing cred stays high.