I would still suggest, being patient.(gonna be tough for you).
Most of us were youg once. I just can't remmember it anymore.
Besides your friends, do you do any After hours sales calls.
If not, you might want to see if he'll pay more commision on After hours sales calls.
He may be using those rates, because your also receiving hourly pay.
Are you keeping a personal log, of your sales.
Then next time you bring up pay. You can justify increased commisions because of a high closing rate.
Or, if its low. You may not want to ask.