Hi & hugs, tryingveryhard~
It's true that addiction is a physical disease, but the medicine is not more forgiveness. After all, forgiving somebody's blood clot won't make the clot disappear.
And, as so many folks here know, you cannot love someone into sobriety. If that were the case, my own son, so sweet and smart and full of promise, would not be walking in the rain somewhere today, coming down from oxy.
Are there any Al-anon or Nar-anon groups in your area? You might try a few. (They are all different flavors, just have to find one you like.) ~ Love~ Nitelite