At my wits end with my 16 year old ds, last week he came home stoned, we had a discussion he thinks there is nothing wrong in this as he is not a regular user and does this now and again, he cannot understand my concenrn and thinks i am over reacting. He has no intention of stopping. I said he cannot have his phone anymore and is grounded. He did not hand over his phone and tonight he has gone to a party even when he was told he is not allowed to go, he turned the location sharing of his phone so i would not know where he is. He is just not listening to me anymore and i feel so drained and just don't know how to deal with this anymore. Any advice on how to deal with this?