wow tough choice you got there. I really don't know what i would do. I would just leave them alone, and go about my own bussiness, i wouldnt want to risk gettin caught.
I've done marijuana, and i stopped the last week before school and been clean since. I don't find it addicitive at all. And to be honest i find smoking cigarettes much much much much more pointless and stupid. I can't stand cigarettes, you just waste your time smoking something for what? bad breath and an even bigger craving in 30 mins? The thing about weed is that you do it for a reason, i just find more sense into it.
Well that's my 2 cents.
And remember kids. Drugz and School Don't Mix (leave that crap for the weekends)