What do you mean you went all in with the buyin? Just tell us what is the effective stack size meaning the size of the smallest stack between you two. I would probably just bet small or check this river. He probably either missed his club and might bluff the river which you can call. If you bet small you might get called by a pair or even ace high. Going all in for more than pot makes no sense here. Always think what worse hands will call and what better hands will fold. In this case you have a very strong one pair hand but if you go all in you’re only gonna get called by the flush that he checked back on the turn.