[MrFroggyX]

Ok this one you played very weird!
More info about your opponents is always good.. After all, NL is about knowing your opponents and not about your card. Against some opponents it's a insta call on the river and against some others it's a insta fold. But as you have played it You have to call the river! You have induced a bluff.. Now, you have to look him up. Don't hesitate only because you get second thought when he bets so big. Continue through with how you played your hand. Was it the best way to play it this way. NO. But now you are at the river and then you can't chicken out. Call. If he show you the nut flush.. Congrats to him. What have you learned? Bet out on the flop when you have anything. You will know where you are depending of the action you will get (or not get).

You should have played the hand like this:
Bet $125 flop. And take it from there depending on opponent. If you get any wild action on the flop or turn.. Be ready to dump the hand.