you guys are pretty harsh on smokers. Calm down there's other things that are way worse for you such as meth cocaine, heroin, etc. I smoke, but it relieves stress/anxiety to a degree and yea I've been diagnosed with ADHD (though it was when I was a kid, and Ritalin made it worse)
I'm just glad I'm not addicted to something worse. Sure, if I don't quit I'll die maybe 6-10 years early, but as long as I don't start drinking heavily or anything like that I'm happy. Most of my family are heavy drinkers and they find it amazing I'm not getting drunk every night like the rest of them. Truth is I can't stand alcohol, and it screws you up just as bad as smoking or worse in my opinion (causes you to do things you wouldn't normally do and get arrested or whatever and screw up your life.)
Oh, and I don't smoke with non-smokers or around people that don't want me to smoke. I always ask if I can or not. Don't bash smokers so hard.