It's not me

In my last journal I wrote that I didn't handle a situation very well with T.  Sometimes I forget that he's still using and that this "over reaction" by him is , not how I respond to a situation with him, but rather it's because he's not right.  Since things are much better on the surface, I almost forget that things are "normal". 
Yesterday I really took it to heart.  I took the blame - like I used to in the past. Yesterday he made a mountain out of a mole hill (complaining "there's nothing to eat".  We don't have enough junk food and it made him mad.  And because it happened so fast - I blamed myself for not responding in the appropriate manner.  After he left I thought "Gee - I should have insisted he sit down and relax so that I could get him something to eat".  I should have done this - or that.  What?
So - this morning - still bothered about it - I looked at his cell phone report on-line because I suppose I just wanted to make sure it wasn't me.  It isn't.  The other day he left his cell home so I peak at his address book and then looked up on line  to see who he's has been calling.  One alias's name is "Crack Rock".  I saw on his texting that this guy is a seller.  Seller of what - not sure.  I don't believe T is involved with heavy  stuff at all - but he is involved with a seller and the calls went back and forth last night.  So it's not me.