Zach, if you served your mission from 03-05 then you are not even close to "old". Fandom doesn't end when you enter your 30's, you just see it from a different light.
Hang in there Zach. About the time BYU is 5-0 and rolling along with incredible wins over Nebraska, BSU, UCLA, and Michigan, and Taysom is on most Heisman watch lists, maybe you'll feel the embers start heating back up. Just don't let the fire within go out. It's too hard to start a fire when the heat just isn't there anymore. Hang on good buddy. Hang on.