Educating yourself is good. Suki mentioned Nar Anon which i found to be a great resource and non judgmental environment. The super short version of my story is I was with my bf for a year, discovered (by reading his FB messages bc he kept lying to me) that he was using. He claimed percocets, I don't even know. The next day, an even bigger bombshell - he was a recovering heroin addict. He had been clean for almost 9 years. He didn't feel I needed to know that even though we planned to get engaged by the end of the year. I wasn't ready to give up on him. He came up with a recovery plan, I did my own things to help myself, but it was tough. All trust was lost and I was scared of him relapsing. Two months later, he did.
Just remember to make yourself a priority. Take good care of yourself. His recovery is his, your recovery is yours.