I feel so immature and boring compared to my friends?

I'm a 16 year old girl that is going to be a junior in highschool soonn.. my friends have all expirimented with drugs and alchohal before, except for my very best friend, who would never do any of that. I would never either, i feel like its basically degrading myself. I mean when I'm 21 or whatever of course i'll drink, but not now. Other than my best friend and i, most of my friends are going to a giant rave, which i don't want to go to/ not allowed to go to lol. Neither would any of them if their parents knew haha..soo basically i feel like im immature compared to them for some reason all of a sudden? Am i? Should I loosen up more..? Im really confused :/