nice to meet you, ds. i have a 24 yr old daughter who has been struggling with alcoholism/cocaine addiction since about age 18. it's tough on parents - i understand.
have you been to any face-to-face alanon meetings? they really help my husband and i.
remember this about your son's addiction (the alanon 3 c's)
you didn't cause it.
you can't cure it.
you cannot control it.
you do have choices, though, on how you allow to affect your life.
keep reaching out - lots of parents over on the friends and family forum here, who will offer some great support to you.
take care of YOURSELF, k