if it where me, I would have layed it down. He showed strenght and you did have a great hand the board did pair and when it did he raised you all in. Now this is a rule that I usually do, if I dont have a good read, or I havent been playing at the table long so I dont have a good read on the table, lay the hand down, dont loose your stack on an iffy call. Save your money for when you know you are going to win and make him feel like he has to make the iffy call. This hand could be argued either way, either you fold and loose 100% of the time, or you could call and since there are only two people in the hand win 50% of the time, so this conversation could go on for hours. My honest opinion was to fold this one and save it for when you know your going to take home the gold.