Lyric discussion by TwirlyRed 

Cover art for Hold Up lyrics by Raconteurs, The

Pretty simple, I think:

The character hates the modern age. Hence, he holes himself up in his own little world. His friends take him out and show him around, but he just feels jaded by everything he sees. However, a girl catches his eye and eventually opens him up/restores his faith that despite all of the problems in the world, there's still beauty in it.