Ive had freinds like this my whole life...Some of my freinds smoke...some are straight edge and some smoke and are straight with e verything else...Just tell them your the same person and tehy shouldnt think differently of your freindship because of a drug you do...I dont think its anyones right to tell your parents the things you are doing on your own time...But it prob just shows how much tehy care for you..To each his own.