hrm.. knowing what the ending is, I've a few more questions.
Assuming that he is not the one driving, can you give us a sight of him? (looking out the window, maybe he sees his reflection? Is he doing anything
with his hands -- nervous ticks? How's he dressed -- is he aware or nervous about that?)
'She' being summer vacation -- again, is there anything physical that can relate the idea of freedom/summer/playfulness? someone running, laughing,
some activity that he can (maybe?) see someone doing that would trigger the idea of what 'she' represents?
I know that this is a free write.. aren't they all in some form or fashion? The one thing that I find myself thinking is 'slow down and *see* the
scene'.. The drive is long, full of thought.. and also terribly short, because when he arrives at skool, the real terror begins.
You don't necessarily have to put an age on him... it's not necessary to the story. But, give us readers some images to see that would cement the
ideas you're trying to describe.. (Think of it as a movie.. what would you, the director, put on the screen to show what emotions he's feeling?)
Sorry if this is too much.. I'm used to asking questions of people's stories to key them in on what me, one lone reader, wants to know from the
story that may or may not be there.. may or may not apply, depending on what the overall goal of the story is. (And sometimes there isn't.. or isn't
right now.. I know. But, I throw my two pennies in the bucket anyhow.

)