If it helps any (and it may not), look at all the kids that smoke, how ridiculous they look trying to bum a smoke, get someone else to buy cigs...and see how they are brainwashed and unoriginal they appear. They are probably similar to the same kids you knew in middle/high-school, they wore all-black, never appreciated anything, didn't care for anything but that next d*mned cig. Don't let your kids get that way (even though that's 10-15 years down the road)...but you can help your child if you don't quit.
If anything else, do it for your kid.
We know you can quit, it's also good to see you admitted to relapsing.