I'm 16! I've been a fan for almost two years and like you Redhead, U2 is the only band I've seen live.
I wish more teens were interested in the band but many listen to the same music and I think it's quite because of the radios destined to young people, they always stream the same tunes again and again. It's not diversified enough ( well in France, maybe it's different in your country...). I've also the feeling that music tend to be like fashion for some teenagers and they just don't want to hear stuff from old bands. How can they live without U2?! That's impossible for me now