[Big_Jim]

I don't know the guy, but does he slowplay much?

If not, his range is pretty well just 66 and 89s, maybe a 56s thrown in there. As well as his bluffs/semi-bluffs of course.

Keep in mind, though that him having a flush draw also entails not betting either a nut flush or a combo draw, with the only rare exceptions of like KsQs/QsJs.

Pair and a straight draw makes sense as well.

When it comes down to it, I dump this. I think the fact that you and villain look weak on the flop makes slowplays and semi-bluffs more likely, and I think he's slowplayed you.