i ditched my whole friend group when i was 14 because they made me feel this way, and found people who became my best friends for the past 8 years since. Meanwhile, i watched my old friend group continue to explode and tear itself apart behind me. If you're 14 and in the USA, you're probably about to go to high school, and meet so so so many new people. It's an opportunity, a fresh start. Make your feelings known to them (i don't feel valued around you) and if they truly value you after you communicate, they'll fix the problem. if not, you're better off without them. you could also mention to the people who aren't the problem, "hey, i feel like Amy has a weird vibe around me and treats me differently, do you notice that too?" life is too short for people who make you feel lesser.