Do what you feel in necessary for you. I think it would be beneficial to you to let your roommates know you're working on yourself. They'll gain more respect for you that way as they may see you being honest, open and willing to improve yourself. If they don't see that now they will eventually. Youll encourage them to be more of who they are, genuine. I say you practice how you want and fuck what everybody else thinks. If it's not harming you or them do what you want.