Sorry to hear. Deferred is a bummer in that you can’t mentally move on, bc you really may still get accepted – or not!
Time to move on. Are you working on your RD stuff for QB? Is it too late to do an ED 2 somewhere else ( and in that case, are you willing to give up on the possibility of Princeton)?
You are an exceptional candidate and it is just a matter of time and strategy for you to end up at a great school. Hang in there!