Tipsy -
I've never been a smoker... save maybe a total of 1-2 months during the 8th grade.
That being said, what I can tell you is this. Every time you think of smoking, think of your son lying in a hospital bed gasping for every precious breath, hooked up to tubes to help him breathe. Picture it until you get a tear in your eye.
This is what happened to me. Both my parents smoked. I was a 3 pack a day second hand smoker. I developed SEVERE athsma at age 4. Made at least 6-7 trips to the hospital as described above over the next 10 years, not to mention countless nights sitting on the edge of the bathtub trying hoplessly to breathe. My parents were too selfish/stubborn/weak to quit. One such night, my mom tried to comfort me by asking "Is there anything I can do?". My response, as a 14 year old, was "Quit ####### smoking!" Yes, I used the F word.
As it turned out, my parents didn't quit at the time, but they did stop smoking in the house & car (basically anywhere around me). They have since quit, thank God. Once I was no longer exposed, my athsma slowly started to get better. Today, I am completely athsma free.
I'm being blunt because I think it's what you need to hear. If you can't do it for yourself, do it for your son. I care for ya, Bro... keep up the fight... you can do it.