I'm 30, and a wizard.
I'm here to say that life doesn't always get worse.
Boredom usually comes from the sense that you are confident of your environment, and from that confidence, nothing surprises you or moves you anymore. Thus, there is inertia, and then stagnation in life.
It can get better. You just got to be sensitive and receptive to life itself. Do something different. Read a book on something you don't understand, or go out of the house when you normally wouldn't.
Even though I'm in my 30s, I'm learning new things, and am still changing. Action is the key.