So, first of all, hello! :)

I am a teenager (13), and I just had my birthday yesterday, April eighteenth. I had a picnic with most of my close friends. So, I have a childhood best friend, Nora (Fake name), who I've known since I was 5 and she was 7, we don't see eachother that often and don't talk everyday, but I love her very much as she has been there for me throughout many things. I also have another best friend, Allie (Fake name), who I've known since we were 10, and we study in the same school, see eachother everyday, talk everyday and sleepover every now and then, I invited them both. Now, I invited another friend, Amy (Fake name) too, I've known her since last year, and she met Allie this year, now, let me tell you something about Allie, she's VERY protective, or, like, possessive, I guess, and Amy kinda encourages it, ever since they met. So, last year, at my birthday party, I had invited Nora, Allie, and a few other friends to my birthday party, but I was feeling awful that day, i was throwing up every 3 minutes and I even threw up bl00d, so, I was obviously feeling down, and I was basically just sitting next to Nora, talking and rushing to the bathroom ALL NIGHT. Allie told me later that she felt excluded (Which I absolutely tried my best not to "exclude her" or anything, but I genuinely felt like I would pass out or something, and Nora had always been my absolute support), and I apologised and thought it ended at that, but, this year, I invited Nora, Allie, Amy, and more friends too, I thought the day was going smoothly, we had arrived at the park with Allie (Since her mom asked us if we could do that favor as Allie's stepdad had to work and couldn't drive her there), and began setting up everything, the next one to arrive was Amy and everything normal, great even, laughs, jokes, everything you'd expect at a teenagers birthday party. Then Nora arrived (Note: Nora's stepdad had just gotten surgery and had to walk with those things that you put under your arm) and everything normal, I had even forgotten about my last birthday and was just enjoying the day, we played volleyball, I met my mom's co-worker's sons, i played with my brother (3) and ate. Then at some point, I noticed Allie looked like she had cried, and when I went over to her and asked her, she said she was fine, I asked her like 3 times and she always said she was fine, and Amy looked strange too, but they didn't say that they were upset or something so I just went back to playing volleyball with Nora and my other friends (The only ones who didn't wanna play this time were Allie and Amy, but they'd played the first 3 times), i noticed they seemed strange and distant after that, but I brushed it off as Allie was just like that and I figured it was just like other times were she'd cry and just not tell me why but then just blame me for not reading her mind smh. When we called them to open the gifts they were distant and on their phones, brushed that off too, cutting the cake? Distant, if you see the photos my mom took they weren't smiling while everyone was smiling and happy. Then, in the middle of me eating my cake (💔) Amy came to me and asked to talk to me for a minute, I said yes and went to talk, she basically said she and Allie felt bad and excluded because of Nora, and when I tried to give my point of view/opinion she didn't listen and just kept saying the same thing over and over again, so I just kinda gave up and went back to eating my cake. They went even further from us and distanced themselves even more, while I chatted with Nora and my friends, but I felt a bit down after that. Well, when it was time to go home (It was getting so dark that you couldn't see anything, basically) Allie was supposed to go with us, she and Amy "Went to the bathroom" and never came back, guess what? AMY BROUGHT HER HOME, without even telling me parents who were worried sick, NOT EVEN ALLIE'S MOTHER. It was terrible, they sent apologies but I felt drained and tired, so I just sent them some very sincere messages about how I felt and told them that I wanted to distance myself, so, AITA for that? I really feel like it's just Allie gaslighting me (Again) but, I don't know, give me some insight, maybe? Also, sorry for rambling, and/or any typos, english is not my native language