He's 15 and is a Cobblers supporter, but plays Saturday football and his girlfriend plays Sunday football and visits family afterwards. So Saturday afternoons are his time to see her at the weekend.
I'm tempted just to buy him a ticket anyway and then he can just turn up to what games he feels like.
Like you, I do think a bit more of the atmosphere might get him more excited but who knows.
Why not buy him and his girlfriend a ticket?