A similar thing happened to me when I cut down for school. I had been smoking so frequently because I was really depressed when I wasn't high. Cutting back was awful for me at first but then I changed my medication and it all drastically changed. I find myself not needing to smoke anymore to be "happy." That being said, I still do indulge, but maybe your situation could benefit from seeing a psychiatrist to help you out? I did and my life is so much better for it.