llavendar,
Remember just a few weeks ago you were out of town, unavailable to your son and posting how he was "taking care of business" on his own? Maybe you need to make yourself "unavailable" again?!?! You DO NOT need to take a front row seat to his using.
Your son will do whatever he will do whether you are involved or not - it's better on you if you step back and just take care of yourself.
Good luck and keep posting.