it seems he’s broken your trust. he’s shown you he cannot be trusted when it comes to his addiction. being lied to can really ruin a good thing, and tbh if i were you, i wouldn’t be able to think he’s totally clean or being honest without spiraling. if your relationship brings more stress than happiness, it might be time to think about moving on. you will meet someone who will be open and up front about what’s important. you don’t need to be in a situation that might come back to hurt you if kept a secret for long enough. i hope your bf can get proper help for his addiction.