Welcome to SR.....I'm glad you found us.
Denial is a tough one. Even when faced with all of the evidence they will lie, they will try to bargain, they will do anything to keep us (their loved ones) engaged with them and their addiction. It's what addicts do.
I hope you stick around and educate yourself on addiction and codependence. Addiction is a very tricky disease. We didn't cause it, we can't control it and we can't cure it........but we CAN get as sick as they are if we dance with them and their disease.
There are a lot of people here on SR who have been where you are right now. They all have their stories and the details may be slightly different but the main story line is always very similar.
You are not alone.
gentle hugs
ke