I smoked from the time I was 15, until I was 33. I got a prescription for something called Chantix that worked really well for me to quit permanently.

It worked well for a few people I knew, but one guy said it made him really depressed / suicidal.

Chantix isn’t available anymore because of something that was in it that might cause cancer, but there’s a generic form of it called varenicline that may or may not be available in your country. Ask your doctor maybe if there’s a pill that will help you quit.