I'm pretty much the same age as you...and I get severe depression in conjunction with psychotic episodes every other month or so, so with that experiences, I can say you just have to put shit in perspective. Think differently. Don't dwell on the past, but don't forget. Focus on the present, and have fun. Everyone says how they wish they were a child again, but childhood is mostly having ignorance as many children don't have the experience to know any better. Anyways stay positive, smoke(but not too much), have fun.