It's not me you see
Pieces of valentine
And just a song of mine
To keep from burning history
Seasons of gasoline and gold
Wise men fold
He is telling his ex fiancee that its not the same person she loved once, his love has been broken (Pieces of valentine), and he writes a song to remind himself of the times he had with her. Seasons of gasoline and gold means he travels alone a lot but he has lots of money

.
I got time to kill
Sly looks in corridors
Without a plan of yours
A blackbird sings on bluebird hill
Thanks to the calling of the wild
Wise men's child
He is alone and have lots of time looking at the corridor, he is following his own plan and not hers. A bird sings on the hill when the wild calls it.