$25nl, 6 playas, effective stacks are $25.25.

Villain(24/11/4.5) open limps button, I raise to $1.25 in the SB w/QQ, BB folds, button calls

Flop is Q 73 w/2 diamonds
I bet $2, he calls

Turn is a 3 and puts up a second flush draw
I bet $3, he thinks for a long time and calls

River is Td
He has a flush how much do I bet here?