The thing is, with the smoking, none of my friends are smokers. They all know just as well as I that smoking damages your health. No one I know is the type of person who says 'Smoke and you'll be cool like us'. I simply can't relate to that question.
In any case, I'd never start smoking. It's harmful to my health, freaking expensive and just plain silly. Not to mention the fact that I'm underage.
In fact, not only would I deny the cigarette, I would also tell them that they should stop smoking for their health's sake. If I did find myself in this situation, I'd rather be healthy than popular. =3
Oh, and it's spelt "deny". =3
When it comes to the second question, if I had a friend who was totally in love with a guy but I was getting a crush on him, I'd just leave him alone. I'd tell my friend if he liked them back and I'd stay out of their way. As a previous poster said, crushes come and go, and I'd be sure to find someone else. Getting in the way of my friend's happiness out of selfishness is a horrid thing to do.
xX