Yeah that's normal. When I first tried MDMA I fell in love, not only because it was a wicked good time, but also because it seemed to completely "cure" my debilitating introversion and social anxiety issues while I was rolling. It turned me into the person who I wished I was when I was sober. I went through a honeymoon phase with it and found myself thinking about it every day and even obsessing a little. I didn't have the self control to space out my rolls and ended up doing it like 7 times in less than 3 months that summer. After the summer ended, I didn't have a connection to get the stuff anymore so I was forced to quit for the time being. In that time, the honeymoon phase faded, and I became much less preoccupied with it. A couple months later I finally found some but this time I was much smarter about it and waited 2 months in between rolls. Even now I still look forward to my next roll, but the wait is much less painful than it was at first, and I think about the drug much less.