Once you raise the flop that much (unless it's a pure bluff), you pass the commitment threshold (PNL topic) because you've put more than 1/3 of your starting stack in the pot. You are going all the way with the hand. If you don't want to pass the commitment threshold, you shouldn't raise the flop. However, villain isn't always going to have a hand and sometimes he will fold to the flop raise. In this instance, villain did wake up with a hand, but we do not have any other choice, it's all in time.