[nigul]

I play the same limit and it sure is hard to say what willain has here. It can be bluff sometimes, but I would fold it 80% of time or so. I think it's acutally better to lead out 1/2 pot occasionally and hope he was on a draw, but even if he was drawing and didn't make it, he might have caught 2 pair on turn or river so it's generally better to keep this money for better spots in future.