Well i think you are unlucky with the board pairing on the river and without going into to much detail,,once he raises on the turn,,i personally would be looking to take it down there and then,,he obviously wasnt scared of top pair,,so he either has a set,,2 pair,,,poss str8,,,or at worse a str8 draw,,,,i think i would av banged all in and basically said its your tourney life to catch me up or overtake me !!! easy said from my comfy chair i know lol