[registrar]

Not a nice spot but I don't think you need any help here. You know what he doesn't have: the nut flush or a high flush. It is unlikley, but not impossible, that he has a low flush given the pre-flop call. It is possible that he has the naked king. It's possible that he has trips or two pair. It's possible, but unlikley, that he has nothing at all.
It's going to be a substantial portion of your stack to call and there's not much you're beating at the moment and he very likley has outs. I let this one go.