My parents won't let me go out alone?

Im 13. I live in a huge community and 12,000 students go to my school. I also live in a very safe suburb. I can't go anywhere without an adult! I can't go to the neighborhood pool without a parent. (REALLY embarring!) I can't walk to friend's place who lives in the neighborhood, i can't walk home with friends after school, i can't walk to culvers, UDF, kidd coffee, or such after school. And to get there i only need to cross one intersection, since they're close to the school. I also live right by kings island, and everyone (including me) has a gold p. They get to go ALL the time in the summer since they can go without an adult, as long as they're with 5 other girls. You know what i get to do in the summer? Stay inside the house all day, sit on my , and wait until dinnertime for my parents to come home. They work on weekends too. They say "you can't defend yourself" or "you are gonna get abducted" and all that stuff. They never let my sister go anywhere when she was my age, (She's 22 years old) and now she's never learned how to defend herself, or stay in control. She can't have a boyfriend, because she doesn't know what to do with one. (I can't have a bf either) She and I are smart, Her gpa was 3.6 and mine is 4.1, and i always get straight A+'s and always in some extra curricular stuff i don't care about. They're always wanting me to do more of that stuff, which i do listen, since i've learned the hard way that its important. But what sucks is i can't have a social life. They call me a "loser" because i don't have people skills. Well they obviously blame it on me. I can't even approach a guy to become a friend! They want me to become a good public speaker.Does that make sense? If i can't approach ONE guy, what makes you thing i can approach a whole crowd? Any advice on the situation????