Ignored and forgotten, or just overreacting?

Okay so, a lot of the time because I'm an aspie I like to be left alone. However, I do like to be involved the majority of the time and my friends usually respect this and understand when I dont want to be bothered to leave me alone xD

But recently, yesterday in fact, my best friend, other best friend (also her crush), and other friend and me went to the park and had a great time, like usual. Then the other friend left leaving me, her and her crush who is also our other best friend.

I had to go home for tea so I did, and then on my way back to them I got a text from her saying she was havig tea with our other friend and she'd text me when they were done and we'd go back to the park for another few hours. She never texted me back so 50 minutes later I texted saying "surely you're done now?" And she replied, "sorry got to walk (otherbestfriend) to the bus stop now". I didnt reply. She hasnt texted back.

I feel like she forgot and ignored me by doing this.

And then today in maths we did team quizzes and of course I was with three friends. The teacher kept nagging me to help my team and I was trying, doing the sums in my head and telling them the answers but they didnt listen and ignored me completely (these are different friends by the way, not from the park thing). A bunch of times that I had the correct answer, they had got it wrong. And we lost in the end. And they blamed me.

Later on during ICT, one of those friends got two different friends to sit next to her in MY seat (You may think this petty but I can't deal with people sitting where I sit and having to sit somewhere else, it gives me a headache and I dont like it). When I protested she told me to **** off because there were other seats. I sat on the other side of the room. After that she didnt talk to me at all and ignored me saying goodbye at hometime.

I didnt do anything to her or my other friends to upset them! Please at least explain what is happening and what to do, I'm so confused!

Thank you :c