bf called me controlling


yesterday my boyfriend said i was controlling and he doesn’t feel like he can tell me things cause of the way i’d react. i found this pretty surprising because i honestly thought i was a pretty chill and laid back girlfriend and the only thing i ever really get on his case about is his use of recreational drugs or gambling and that’s only because i have previous trauma regarding my dads addictions with that stuff. it’s really upset me because i have been racking my brain trying to think of times i might have been controlling without realising and i can’t think of any. anyone know ways i might be subconsciously controlling him?