Please don't try again, I'm not trying to be condescending. If not for yourself, for the people you love. Nicotine addiction is particularly insidious.

Lots of people gave me this advice the few times I was addicted, I ignored them all and simply thought they were talking down to me ("of course, I know it's bad for you", "I can quit whenever I want") so I understand if you interpret it that way. Once you've seen yourself or a loved one go through it and survive (or worse) you have a different reaction, a bit like seeing someone standing on the tracks while a train is approaching. Wishing you good health.