what do you think he has? he could have an overpair to the board and think his hand is best. I dont think that he is on a draw since he bet the turn. I would push here because he could think that you are making a move at the pot. He probably has a pocket pair, QQ, KK, AA, 99 or 88 mabye. If he has JJ well then u just got unlucky. Push here on the turn though