There is a truism that the only things that are certain in life are death and taxes. Corollaries to that would be the fact that those who don't learn from history are doomed to repeat it, and that one definition of insanity is doing the same thing over and over again and expecting a different outcome. The latter two points are particularly relevant to the crossdressing "purgers" out there.
I would add that the urge to crossdress will not be "cured" by getting married or by entering into a similar type of committed relationship either. This has been confirmed countless times on this Forum by those who thought that they were stronger than that and could beat the odds. The "House" always wins at the end of the day, and while the urge to crossdress may lay dormant from time to time, it always comes roaring back eventually. It is who we are and the way we are wired. It is a life sentence with no parole or time off for good behavior. The sooner we come to realize this and come to terms with it, the sooner we become at peace with ourselves and the world as a whole.