It looks like he's put you on the flush draw and you won't get anything more now. Still I'd bet half pot on the river and hope he does something crazy. As far as what villain has, the board is so dry, he could be 2barreling his entire range here.

You could raise this flop even though it's pretty dry. It might look bluffy to him. The thing is, if you're going to stack somebody, there has to be a raise somewhere postflop, and the flop raise gets the least respect.

Also, cold-callng QJo, especially with alot of people still to act, is probably not gonna be profitable in the long run.