*Before anyone gets all huffy about secondhand smoke being a problem I have experience with it. I was a non-smoker who roomed for a couple of years at college with a pack a day smoker. When I moved out I found I'd become addicted and started smoking (stupid, I know).
No you had another reason, you're just placing blame on those around you for smoking. Whether it was stress, it seemed like that was the likely cause, or something else. My father smoked a pack to two per-day, for close to 15 years. My grandparents(all three that were still alive) smoked upwards of 1-3 packs per day, until they died. I never became addicted, I had no desire to smoke. The only thing I missed was the smell of burning tobacco, and fresh picked. That's probably because as a teenager I used to pick the stuff(meaning I got all the crap oozing from the plants on me), but again I didn't start smoking because of it either.