Floridawife,
Just wanted to say "Hi"- good advice above- I especially agree with Hangin about trying to find an Alanon or Naranon meeting. The addict in my life is my son- currently doing time- and his primary DOC was meth but I understand feeling stupid that you didn't know what was going on- my journey started almost 5 years ago when he was 17- it feels like forever!
The good news is that he is clean and sober and he truly has made steps forward- but there were lots of relapses- some of them worse than others. Relapse is part of recovery- it is a phrase used around here often and believe me, it happens- it hurts- it disappoints us- it can destroy us- if we don't have tools to help us through it.
Learn as much as you can- and take care of yourself. It is so easy to make your addict the absolute center of your universe- and when things are good with them- they are good with you and the reverse of that is when things are bad with them- they are bad with you!
Take care~