i just don\'t know anymore/sad

T's counselor came to our house today.  He brought a sheet of paper with a list of things T needs to work on or has done that looked like drug behavior.  He also had let T know what I saw on-line - drug conversation.  His friend was asking my son for all kinds of drugs but T  couldn't help him.  He did ask if my son were willing to sell.  Son said yes and had phone # written on his hand the next day.  I don't think he followed through on it because he is still broke and seems okay.  After we aired everything, T seemed fine.  We even discussed T going for a blood test.  T seemed fine with that.  After counselor left - T gets mad at me and said he wouldn't go.  He took off and said that I made it up.  If he isn't using, why would he want to dig himself in deeper?  It breaks my heart.