He was lying for 6 months

So I had a super weird gut feeling that something wasn’t right. I noticed my husbands drug dealer text him.... but its been forever since he bought cocaine.... apparently. So I look at our phone bill records and sure enough it’s been like three times a month as far back as June. I started searching through everything. I confronted him he denied it wholeheartedly. I bought a drug test, he refused to take it. I combed through our bank records. I reached out to people about bills we had. I confronted him about everything I found. Told him if he wasn’t honest he’d come home to an empty house. He finally came clean. He wants to work it out. All trust is gone. We’re supposed to start therapy soon together. Idk what to do to. Idk where to go from here. I can’t live like this