The first thing people need to get about stopping cigarettes and quitting weed are not identical. When you quit cigarettes your body will have yearnings as you will be addicted to the chemical in them which is nicotine. This addiction is physical and the cravings can be extremely off putting until you have a smoke.
There is no chemical addiction in Marijuana, people actually become accustomed to the “high” feeling from smoking it, so therefore this is a psychological addiction. The body will not have the same yearnings and the reason for it being hard to quit is because you don’t want subconsciously.
Even though you will not be physically addicted you will still find it hard to quit because a psychological addiction such as this or gambling would normally be down to weaknesses or personal issues as to why you keep returning to this addiction. It’s not to say you have no willpower, it usually requires a deeper look into the reasons for smoking in the first place.
The reasons to quit smoking weed are plentiful. You should need to learn how to quit smoking weed and move on with your life.