Used to do a lot of different types of drugs and nothing is as fun or fulfilling anymore. What can help?

During my high school years, I maintained a 90+ average in all classes, never failed a test or missed a homework assignment. I was a pretty bright kid, never studied or anything, things just came natural. With all the excess time I had, me and a couple good buddies started smoking pot our sophomore year. Nothing out of the ordinary, just some kids having fun. Then my friends began dealing as the year progressed, slowly but surely their market opened up to new things.

Long story short, for the past 2 years I've done multitudes of different types of drugs in all categories. Favorite by far were the hallucinogenics. I never let it take over my life, school still came first, but one day my friend got arrested and that was a huge wake up call to me and my other friends. We decided we'd just stop cold turkey, and we did just fine. It was a little rough at first, but cigarettes helped us switch to something else (stopped smoking too).

Now I'm just going through my life day in and day out and nothing is as fun or interesting or new as it used to be. I miss the adventures, the mind blowing hallucinations that would be all around me. I miss the feeling of not feeling well... normal. I love that altered state, I miss it. It's not so bad that I'd do it again, but I just feel a little empty.