i don't know what to do anymore...?

i'm not too sure where to start with this. whoever reads this i am so thankful and really appreciate it as it is just a rant i am going on and hope to get some answers out of it. i'm 15 years old, i'm a female. i guess i don't really 'belong' in a certain 'group' at school anymore. i used to be good friends with a group of people who i suppose you would say are the 'popular' ones in my year at school. i am still friends with this group of people, maybe not as good of friends but still. i guess the reason why i sort of moved on from these people are because i am completley different to them, and think differently and i suppose have been brought up differntly. and here's my point - my parents. my parents are great, i do get along with them well, not always but most of the time. anyway, this group of people i used to hang around with at school were the sort of people who went to any party possible, had parties them selves and i guess just got drunk every weekend at someone's house and just basically lived like they were living an 18 year old's life, at 14/15. my parents don't think this is right, which in a way i suppose isn't, but when your 15, and wanting to do anything possible to have as much fun as you can and feel like you fit in, it sounds completley fine. last year when i was i got very drunk and lied to my parents quite alot, about all sorts. i felt i could never ever talk to my mum about anything, from boys, to friends, to just general conversation, i didn't feel i could just open up to her and tell her everything, i didn't want her to know about me, not one bit. i feel so much regret for that now because if i had just opened up to my mum about things before i would never of got into a mess. i was in such a mess! i used to meet up with this boy older than me and never told either of my parents about it, because i was scared of what they'd say. i used to just lie about what i was doing or why i was doing something. i just wouldn't talk to my parents. well as a result of this i went to a party, my parents knew i went, i didn't lie about that part, they just didn't know i'd be drinking. and gosh did i drink! i don't normally drink alcohol and so i was drunk very quickly. when i got home i was in so so so much trouble, i knew i would be. that was when i told my mum everything i told her all the lies i had told i just basically told her the truth about everything - she made me, ofcourse. i wasn't 'grounded' as such after this, i just wasn't allowed to go out or be trusted to do anything for a long time - months even. and still now i don't think they trust me. i'm 15 and coming up to 16 now. all my friends (including the ones that were in this 'popular' group that i used to hang round with) get to go to parties, drink alcohol, and do stuff that my parents would never dream of letting me doing until i was 18! i just feel so i don't know what even the word is. i just see everyone else having fun and i guess growing up faster than me? don't get me wrong i have totally taken full responsiblity for why my mum and dad were so mad at me and why they shouldn't trust me, but since then my mum has said they do trust me and have forgotten about all that stuff that has happened, but as a result of that i have let all that 'party' stuff go because they have seen i can't look after myself. and now everyone i know is turning 16 this year, everyone will be having parties, and i guess i'll be invited to a few and i just know i won't be going because i'm not allowed to drink, or because i'm not trusted to drink and control myself. in my house its, 'when you're 18, you can do what you want, go out and do what you want, but until then you do what you're told but i just see all my friends growing up so fast or seem like they are and why aren't their parents stopping them? why is it me that feels like i don't go out as much as my friends. i do get to go out when i ask but not like how my friends do, like on a night. i feel like i'm wrapped in cotton wool sometimes and i won't ever get out. even my mum said she still sees me as like a 13/14 year old. maybe i'm just way ahead of myself in my mind and should jus stop for a moment and think, i am only just 15? i have my whole life for all of that.