hi Keeem, i smoked ssince i was 14, tried to quit a number of times the longest i lasted without smoking was around 1.5 years and i was heavily into sports back then which don't go well with smoking.
last time i tried to stop was last year but i only managed to stay 1 month without smoking ><
my advice if you want to stop, its not eazy but here are a few things i think will help:
1) no smoking in the house i mean not even others not just you. let them smoke outside
2) don't go to the smoking area in work, even if you wanted to carry a cup of coffe and chat a little, skip it
3) drink a lot of water when you get the urge to smoke.
4) have some peanuts or some sort of snack to help you in the first few weeks, after that its not neccessary
Thats what i can think about, probaly there a few more tips other can give ya good luck if you want to quit,
To be or not to Be