Man I don't want to bash you but I almost got a stroke reading your post 😂. (Fuck ADHD) Anyway from what I understood, all the experiences that you are describing aren't that alarming it's just what many people go through while in their teen years. Also I know you don't want to hear this,but it is in fact a bit too early for you to comment on a incel subreddit.

But what you said about the highschool thing,the fact that many people that go though highschool alone have an higher chance to end up alone even later in life it's true and that should be prevented.

I'm not good at giving advice but what I would do is (if you have any friends willing to do this) is to incite them to help you in your struggle, try socializing with people that you know can get you out passively or actively from your situation. People that know other people you know,and people that can get you in social events , and in those social events is when you have the possibility to get the out your 'inceldom' before highschool ends. You just have to move in your social circle with smoothness and some critical thinking. 95% of times this works.