Smoking Habit Again

*rolls over the floor, destroying furniture, laughing*
That's just as bad sweetie. As a matter of fact it's worse. Of course you should care what others think of you. Who will you work for? Who will you associate with? Who will you fall in love with? Other people. They are what you'll live for (hopefully). If they are discontent with you, then I'm afraid they'll go all "Sorry, no soup/money/love for you". If a majority of people thinks you need to change, then you sure as hell do need to change. Of course you can't be what you want to be. The game called life has rules, girl. :D You'll learn them when you've grown out of puberty. Everyone does.

To speed that up a little...
Think of it like this:
"Hurrr me don't care what others think of me. Hurrr me do what me wants to. Hurrr me reek of smoke an go pollute other people's air."
Like what you hear? No? Maybe you'll like this fictional example better.
"I have a great idea! I don't like working anymore so I'll just burn my degree now and start a telemarketing scam. Cold hard cash all the same."
Egotrippers are the weight to society's leg.

So yeah. Since this is Help With Life I strongly advise you to grow up sometime soon and start caring about other people's opinions of you. They can be dozens of times more important than your own self-esteem. :)

 

Go buy Nicorete or something along those lines to ease the craving. Or simply, go cold turkey.
Sure it's going to suck, but going cold turkey is justifiable punishment for starting it in the first place.