Glad you're joining us. Yes, there are many wise ones here and I continue to be thankful for this site. So let me welcome you with big ((((((hugs)))))).
You have a lot going on right now, but let my start by repeating what I have often heard:
You didn't cause it, you can't control it, and you can't cure it.....where he is in life right now is not your fault....you did not cause it.
It sounds like he is manipulating you into feeling guilty so that you keep helping him....and helping him means you are enabling him to abuse drugs. If he has no where else to turn, it is by his own doing, and he needs to face that....not you. You do not need to lend him your car, you don't even have to give him a place to live. I know you want to help, but you are helping him continue to use.
I would be angry too, but remember, it is ok to say no. Anger and resentment are not healthy, and they will continue to build if you aren't careful. Take care of you and keep coming back.:ghug3