The reason for the check-raise was to attempt to get it heads up against a loose and aggressive player. On second thought, I think I should have bet the flop and hoped the BB raised. However, the table was extremely passive, and I believe if the BB raised, I would definitely be behind. So I checked, not really sure what I was hoping to accomplish, though honestly I probably would have folded to a BB bet and multiple callers; I would be hard pressed to continue with an underpair on a scary board with many opponents.

However, since the BB checked, and the LAG bet, folding two other players, I tried to get it heads up. I failed, but established I was most likely ahead of BB.

Part of my question revolves around playing this hand out of position. I have issues resolving river play when I'm first to act. I think a check-call on the river would have been a better play as well.