I think that kind of answers my question. I think I read somewhere that nicotine does act as an antidepressant in the brain. I am not talking about withdrawal because I think I went through that in the first 6 months.

I am going to try vigorous exercise. I have been depressed since I quit smoking. But I would never go back and I don't have cravings. I don't think about smoking when I get stressed.

Maybe I was depressed before and the smoking masked it. All I can say is that it takes a long time to adjust after quitting...and for those on this thread who have stayed quit...job well done! Thumbs up! Don't ever go back.