You were probably just using it heavily, and incorperated it into your lifestyle. Anything we incorperate into our lifestyles is going to be hard to give up just like that. To the average person out there, taking away television would be pretty bad. Remember how much it sucked not having TV for those days you were punished, and how simply awesome it was the second you got it back? Works the same way with weed, because weed is not additive to a point where you need it. You just want it, and mostly because you are so used to using it, and everything else feels like it sucks.

If your at a point in time where you gotta put weed aside to make room for important things, then thats what you gotta do. It you really have trouble not smoking, maybe try smoking less often gradually until you take a true break. I took a break when I grew, which worked out pretty well since I was still around it so in a way I guess that helped. It also takes up quite a bit of time setting everything up and maintaining it. Eventually I came back and only smoked in moderation from there on out for the most part. The less often you do it, the better it truly is.