My bf lied to me

So awhile ago my bf tried to stop vaping for good and he told me he did . I had a sus feeling that he was doing it again but didn’t want to accuse him of it . Recently I saw him post a photo on Snapchat and he didn’t notice but there was a puff bar vape in the photo. I confronted him about it and he told me the truth , I was angry but I don’t want this to ruin our relationship. He told me he was embarrassed about it he told me he thought he would quit but a week later he kept getting a new one and the same relapse occurred any advice ?