[Quebecker]

a check mean weakness. Small bet the river and he will probably simply call. By checking, you show him your weakness and give him the opportunity to try to bluff you.

I really don't like the way you bet... you underbet, on the flop a 3,5$ to 5$ maybe should give you the information you wanted. I see the villain on a flush draw or he has the Aces and have is aces + gutshot straight draw.

I don't think the 6 of diamond on the river helped the villain.