[goblinhat]

I dont understand your raise on the flop at all really, your re raising after already a raise and a re raise. Ok now i have read ur reasoning for that, however i do still think its a mistake putting that much money in the pot when a call might give you little outs( as u said u thought the original raiser might be on a draw)and u also have to fold ( just i think?) if he pushes back on you with a set.
I think chances of a pure bluff are low in this situation despite checks on turn as so much money in pot and any flush draw has made it,(also means he is unlikely to push a set) despite making ur hand i think u can lay it down with the knowledge he is likely to have the flush and any flush beats u.

Wish this post was a little more fluent.