Drug Addict

I am so lost. I fell in love with a drug addict. When we first met, he had a year clean. Things moved fast and we moved into together. He treated me like I have never been treated before. He then relapsed (which I totally understand, I get it, it will not be perfect the whole time) it’s something he will struggle with for the rest of his life. The problem is the lying about it. I told him if he slips up just to tell me. He treats me perfectly, even when he is using. And everyone just automatically assumes I should leave him, but I don’t feel like it’s the end for us. No one can see our relationship and how happy he makes me, when he’s not lying. And I’m so new to this I just don’t know what to do. He has supportive parents, and his parents are supportive of us.