Life growing up sucks

So like it’s been kinda hard getting used to “ Growing up” I’m 15 and my friends are doing things that I cant relate or do I want to do them such as sex, weed, and drinking. They call me the “ mom” out of the friend group just because I help them when there wasted, to high to even take a shower, or just plain heartbroken.I like doing things that I guess most teens don’t do idk I love reading and going outside and watching kid stuff I try finding people who like stuff like that but im shy and I have anxiety and people tend to ignore me when I try to start a conversation.My friends now don’t even want to hang out I never get an invite asking if I want too hang out and when i am the one asking they always say their busy

it’s not like I’m telling them not to do those things I don’t care as long as they don’t pressure me.

But god I been feeling hella alone does anyone have any advice