I think for someone who is a 20yr old adult, I think it's time to mature and tell them. Only kids who are afraid of getting caught hide it from mom and dad, but come on man, you're 20yrs old now. You've been to the army, you're in college, so it's not like you've took a wrong turn somewhere. You're a responsible cannabis user and if you tell them that, they might just understand.

It's time to grow up and let them know. Stop hiding it and get that money off your back.