You can try herbal remedies, unfortunately, these can give some people a queasy stomach. Then there are the popular nicotine replacement treatments, readily available as patches, gum or sprays.
You can quit smoking. The real reason for smoking is your emotional state. You like the feeling of a truly “friend” who by your opinion is always in the right mood. First fact is that this is only your opinion, and second fact is that you can easily link pleasure with any similar thing (For example you can make connection in your brain to start feeling cheerful whenever you take a chewing gum).
I was a smoker just like you and enjoyed it very much. I did care regarding the smell or my teeth. I came to the point were I had to actually replace 8 of my teeth because of smoking. This was my the first time I understood I had to quit. 3 years later I am clean, healthier, smells better, and know that any one can do the same as I did.