Something feels wrong

I feel so at peace, yet so lonely. Time seems so slow and so fast all at once, and it's scaring me. I feel like im still 12, because when i was 12, everything was okay, i didnt care what people thought. Now im 16 nd trying desperately to go back to that stage of love for myself. Dont get me wrong, i love myself when im alone, but now, around other people, all i feel is the pressure to fit in and like what everyone else likes, and if even just 1 thing is different, my brain just makes me think im weird, and maybe i am weird, maybe i just need to accept that fact and ignore everyone else. But I care too much, and way too little all at the same time, I just need to figure out how to change that.