Most Helpful Guy
It's happened to me before, being given a rollicking for getting tickets for a gig I thought she would like as it was a tribute to her favourite band of all time. Took her 3 weeks to explain why it was inappropriate to get tickets for a Grateful Dead tribute. The day before her Grandfathers funeral.
If he is still not opening up to you go back over and if he won't talk to you, talk to his parents. They may offer an explanation, or maybe they would think their son is being a complete spanner and read him the riot act when he surfaces...
Most Helpful Girl
He might just feel bad that its such expensive