I should fold this river, right?

[Lmn55d]

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It didnt seem appropriate, at the time, since there are a plethora of turn cards i didnt really want to see

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That's actually one of the main reasons why you might want to wait for the turn.

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In addition, he was the kind of player who i suspected of being able to 3bet the turn with a pair and a high diamond. As my hand isnt that great, i didnt necc. want more bets going in on a lot of turns. Weak-tight perhaps? (also, sometimes when he 3bets me on the turn, he has me absolutely crushed, but im pretty sure i have to call down.)

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These thoughts seem contradictory.