Please don't worry about coming to seek support. That is what SR is here for.
I am guessing you only know the tip of the iceberg as far as his use. Addicts are crafty.
That being said, I think the counseling for partners is an EXCELLENT idea for you. Thing is, you cannot be in charge of his recovery. He has to do that, not you. However, you can go and get the support you need so that no matter what the outcome is, you are good within yourself.
Big hugs.