They say you are supposed to go through your awkward transition phase during middle school, but you still feel like you haven't quite figured it out. They say you are supposed to join a club in order to "find yourself", but then you end up sitting in the back watching everyone laugh and catch up. You feel out of place--like you're existing somewhere you just don't belong. Let me be the voice telling you that you are exactly where you are meant to be right now. Every decision you've ever made has led you to this place. This is, of course, much harder to grasp than to just say. Really though, you're doing just fine!
Finding out the things you don't like to do are just important as discovering your passions when it comes to finding your true self. Don't be afraid to join that club, talk to the girl next to you in class, and explore your interests. You might hate it. You might want to run away, but at least you're learning about yourself and where your comfort zone lies. Finding yourself is a life long process, so don't expect an Aha! moment where you have finally hit your destination. Think of it more as a sense of confidence of comfortability in who you are and what you stand for.
Stepping away from friends and family for some time may also lead you to who you are. Often, we grow up and mature only to have the same beliefs, morals, and political opinions as our parents. It's not our fault and we aren't childish, we just trust our parent's judgment and see their conscience as nothing but truth. Part of gaining independence is questioning your own biased beliefs and reevaluating them so they reflect your character better. Same goes with friends. Try to spend a Friday night in with yourself. See what you do. Do you watch a movie? Do you catch up on homework? Do you paint your nails? What is it that makes you feel happy when nobody else is around? By considering the answer to this question, you're one step closer to figuring this whole life thing out.
You may also want to try stepping away from your phone. Your social media (this shouldn't come as a surprise) is giving you the false idea that everyone around you knows exactly what they're doing and enjoys doing it all. Not true. So not true actually, everyone else is struggling to find out just who they are. You and your phone need some distance.
Finding yourself doesn't just happen. You need to explore the world around you and you'll eventually find out where your place is. Be patient with the process and know the right steps will surface when you're ready to take them. Be kind to yourself and have the bravery to discover the girl inside you (I hear she's really cool).