Meaningful thoughts prompted by song lyrics

AKA: is this song about me or am I superimposing myself on it? Well, the chorus is about right. Even down to the left/right thing. Drove my driving instructor nuts. And what the frilly heck is a wonderwall?

Everyday I wake up and it's Sunday
Whatever's in my eye won't go away
The radio is playing all the usual
And what's a 'wonderwall' anyway?

Because my inside is outside
My right side's on the left side
And I'm writing to reach you now but
I might never reach you
Only want to teach you
About you
But that's not you

Points for anyone who knows who that is... or anyone who does know what a wonderwall is... or comments...