How to grow up faster?

I'M 13. and I feel as if I don't wanna grow up anymore. I want to act like my own age but what really makes me look like a kid is my shortness, and weight. I'm not five feet yet and I'm not 90 pounds yet either. I wanna act more mature, I wanna grow taller too so that people can see I'm more older (my face does not make me look younger tho). I think I'm growin up very slowly becuz I'm always getting overly exciting, jumping around, talking really high, really shy, don't apppreciate the fact that I'm growing up, envy the fact that my lol bro and one of my bf are younger than me. I mean, I try to think n act like a teen but than I worry that I won't be the same anymore n get treated like a teen (doing chores, doing stuff by urself, being independent. I like being dependent not undependent) then I change back to a kid again. Someday imma teen somedays imma kid. Am I suppose to act this way for a 13 year old? I'm a girl