Why are people so fixed on being "normal"?

I feel like everyone at school is so fake and they all care about being normal. Today we did a disection of a chicken wing, haha, and I told my freind I thought it was so cool and she just told me I was a freak. Then in bio we were looking at a book about the human body without skin and yes though it was gross I found it really interesting. I talked to my bio teacher about it and I told him I wanted to maybe go check out more books lke it. Because of this my freind told me I was weird again. Ok biology is a subject I find interesting and even though the labs and things we study are a little gruesome I still think it's cool and how does that make me werid???? Also my freinds don't like walking to cl alone. Like they always need to be wiht somebody or they feel like a "loner." Ok I walk to cl alone all the time...and I'm not wierd for it. You know sometimes people walk places alone. It's totally normal to go with a friend, but I would say it pretty normal too if you are walking alone too. One time I was alone and my freind came up to me and was lke ,"Dude why are you alone????" and i was like, "um thanks for being concerned but I'm walking to the hall to eat lunch wiht my freinds" Like it was nice of her to think of me and all but that's how crazy it is. People automatically ume something is wrong or that people have no freinds if they walk somewhere alone. Idk I just feel that nobody is willing to just be themselves...does anyone else feel like this? And can anyone who's older tell my why my friends are like this? I mean I tell them all the time who cares what others think but for some reason it matters so much to them. I don't want to live my life just to please others, but it's really hard to get along with them when they are so uptight. I feel like I can't be myself with them because they think I'm weird for it and mostly they can't appreciate/realize that I'm not scared to be myself and that I wouldn't judge them if they acted their true selfs either.