Good morning Juan,
You've gotten some REALLY good reply's here, great advice,... the only thing I can think to add, is maybe look at (on top of ALL the above), the habit part of smoking - you know those false "reasons" we gave ourselves to smoke,... like, coffee and cigg go together, or talking on the phone and smoking helps me concentrate or have to have a smoke after I eat, or, got a good review at work - need a cigg to "celebrate".... all nicotine LIES!!!....
if you don't smoke, NOTHING happens... not sticking a cigg in your face IS the new "nothing" ... and your nicotine addicted brain try's to tell you "It's part of me, my routine , I can't change it FEELS TO STRANGE AND I DON'T LIKE IT"..... see this for what it is... once your 72 hours nicotine free are past .. it's the - routine part - you have to see for what it is, and realize... humans are hard wired not to like being out of their comfort zone...but, that's ALL it is... it's uncomfortable - no doubt about that.. but see it for what it is.. giving it time to become the new normal was important for me to get my quit...substitute something else for ciggs.. tooth picks, gum.. whatever works for you..
Give yourself time to get a new normal... it's worth it.. I promise!