...Will he go to counselling if you go with him, or does he have another, preferably adult person he can talk to? Perhaps a close friend? Although I think boys of that age are not too good at opening up to their mates about things!
I agree with Anna26. Finding a trusted adult who would be able to offer a safe place for your son to explore what's going on and his reactions would be extremely beneficial so that certain behaviors don't become patterns.
I wouldn't be surprised if your son actually does want to talk about it, but the fear of being vulnerable (and knowing even what to say about the confusion) can keep him closed. Do some asking/investigation to find a counselor that might relate well with your son. If your son is open to it, let him be part of the process.
Ask him to commit to a single session and then you can re-evaluate the next steps. He may find tremendous relief in a therapeutic relationship that provides expression the the pent-up thoughts & feelings he's experiencing.