I am not really in your age group, but I really struggled with my diet in my teen years. It got so bad when I was 13 that I had 2 siezures in 1 day. Nowadays, I actively participate in a PKU support group that meets in my area. Several adult members of this group are struggling to get back on diet because they were taken off of it since they were 5 or 6 yrs old. Being back on the diet has improved their health in great measures.