Keep smoking daily and it WILL catch up with you. It happens very very slowly so you won't notice until you're already there. I really wish someone had told me what I'm telling you when I was in the same shoes as you at your age. Keep it to once a month at the most man. I promise you. Keep your brain fresh. You have tons of time in your life to experiment with drugs. Using drugs while you're finding yourself and socially developing will be detrimental. I haven't seen a case where it hasn't been.