[XxPenguinxX]

You must have better reads the "Villain hasn't done anything crazy". If not, you're making difficult spots impossible for yourself. How has he approached unraised flops before? Flush draws? You haven't even said if he has been generally aggressive or generally passive, which is enough to change my answer all by itself. This is heads-up - you need detailed reads or you deserve to lose.

I'm not saying it's right, but why has nobody talked about check-raising all in? You have fold equity if he doesn't have the 4 or the flush, and if he has either of those you have plenty of outs.

I'm not saying it's right, but it was my first thought here. The way you've played on the flop and the turn makes you look very weak indeed, so this bet could be a flat-out steal.