I don't seem to fit in with any of my family...and they are so judgmental of me?

I love my family but none of them seem to understand me and I don't seem to fit in with any of them...I'm 18 years old and I'm quiet, nice, fun, smart, and I'm think I'm a pretty responsible person...but I don't fit in with any of my family and I don't know why...ever since I can remember I've been different from all of my family members...for starters my mom has 3 kids...my brother, my little sister, and myself...my 5 year old sister is an all out girly girl...she acts grown (like she's 16) she's already into purses, fake nails, boys, etc....and my mom lets her get away with so much...the reason why......so she can be my exact opposite....when I was 5 years old I was quiet, shy, but playful , and funny...I think I was a pretty normal 5 year old child...my mom didn't allow me to do as much as my sister so I guess I wasn't normal...I'm not sure...but my sister is more girly than I am...I wear sneakers she wants to wear heels...I wear jeans she wants to wear short skirts....(you guys see where I'm going with this??) I play video games and my sister wants to do her nails...my mom always compared us and she said that she wants my sister to be my exact opposite...I'm not 100% tomboy because I still dress like a girl and act like one but I don't feel comfortable wearing heels and doing other stuff like that...I'm straight (I don't like girls)...it hurt me so much that my mom didn't really accept the fact that she had 2 daughters that are different...I thought that I got away from all of that when I moved with my dad...but I realized that was wrong...on my dad's side I've always been different (they're loud...I'm quiet....their freaks...I'm a virgin...you get the picture) I have a cousin on my dad's side...we're 2 months apart she has a 4 year old son......well I don't.....everybody on that side is gossiping about something...I don't see the point in gossiping so I'm just quiet.....on my mom's side my aunt (her sister) and my grandma treat me like I'm slow...I hate going shopping with them because they always have something to say about the stuff I like...like I said before I don't wear heels...well because I like to shop in Foot Locker they said that I have flat feet and that all my sneakers make me walk like a duck....I don't walk like a duck...whenever I look at something that I like I turn around and their wispering and commenting about me...why am I the topic of discussion?? I've already had to deal with disapproval from my mom...now this!!! I realize I'm different...but it hurts that nobody seems to understand me...not my mom, not my grandma, nobody in my family for that matter!!! I question God and ask him why did he make me this way?? Why didn't he make me just like them?? I'm so confused...how should I go about this?? What positive could come from this??