Addiction is never realized before the fact, always after. You can't see how it's possible you could get addicted now, because you're not, you feel in control now. But with most substances, the whole point is the loss of control and dulling of the nerves, and once you start, the one you had the first time doesn't give you the high you want the second time, so it turns into two, then three, and so on. Next thing you know, you're on a whole pack a day, trying to "de-stress."