I started smoking at 17 and continued for 18 years. I went through all the highs and lows smokers experience and made all the typical comments :-
"Its my health so its my problem"
"I can stop anytime I like"
"These chest pains arent smoking related"
"Its just a cold"
"I enjoy smoking"
etc etc etc
I even had days (and im not alone in this) where I thought that if I dont wake up tomorrow because of smoking, then I had better smoke more today.
I read a very famous book on stopping smoking. Im not going to say what it is as im not here to advertise and make money for others but its the main one. It works, trust me on that. I stopped one month ago and I have been out running every day for the last 3 weeks. Like most smokers, I tried patches and gum but the truth is they just delay the craving.
I truly recommend stopping smoking. Do you remember the last time you woke up and actually felt healthy? I waited 18 years for that feeling and it truly is worth it.
Im not going to be a nightmare ex-smoker, I dont complain about others smoking but I just feel better.