Just own it. It is ok to be a little bitter. We all get it. We all even feel it a bit.
Just PLEASE, do not grandstand on the team bench and challenge all BYU fans of the world to a fight. Trust me on this, that behavior would only reflect badly on you. Celebrate with your team and enjoy a private moment of vindication-- if the opportunity arises.
BTW, if they ever throw you a flare screen to the flat, you are guaranteed to make at least 5 yards because BYU doesn't feel the need to defend that play. (OK, little bitterness leaked out there. Sorry.)