well i think you are safe on that situation...because you are not totally a user...for your own good and safe stop using it even if it is occasionally or what so ever..good luck..
for me ages 14-17 are the age that most of the teenager used it..actually marijuana is a medicinal plants..it is just happen that using this weeds most of the time can lead to them in someway addiction that can lead them having a non-sense life..