What should I do about my ex-friend?Should I explain/talk to her or is the friendship done?

[Tessuh]

First of all I know this is Long and I'm sorry I just like to add details so you get the full story. So please help me out cause i'm stuck on what to do.
So I had this friend Katie. We had been Best friends since 7th grade and I honestly thought we would be friends forever but this is our whole friendship.
So the first fight we had really was when she started dating My Ex. I was at her cause she knew we dated and I still liked him. But then I forgave her. We called ourselves BFFLAD (Best Friends For Life and Death. Then 8th grade started we had no classes to gather so she made new friends and at the beginning we Hung out A lot still then it got less and less she would invite them over before me. Then this really made me mad We had our Own group (Autumn Taylor me and Katie) and she knew I didn't like Taylor at the time because we didn't get along back then but still sat to gather. Katie calls me a friday Night and says Hey do you like Taylor? I said no not really and she said Oh I'm not friends with her anymore we got into a fight and I started saying some stuff about Taylor then Katie says Here someone wants to talk to you. She had me on Speaker the whole time while she was at her house! and I just said all this mean stuff! I was mad! But again I forgave her.
Then we were pretty good except for the occasional fight and I admit. I did wrong stuff too in our friendship. Tried making her Jealous a lot,Exaggerated alot,and alot of stuff. Then towards the End of 8th grade She would just be really rude sometimes! She would Judge me a lot(as in say why are you so Quiet or If I said something weird she would make a face and say that's stupid!) I would always have to go to her to make plans to hang out and sometimes she would make an excuse"Oh Tessa I'm babysitting I cant." So then Autumn told me Katie was making fun of me and talking bad about me and I know I shouldn't have believed her but It just seemed so Legit Katie would do that. So I kinda just was secretly mad at katie. Then she told me She was dating My ex AGAIN and she said If I didn't want her to date him she would break up with him.She said she liked Him a lot and So I said they could date and after 3 days they broke up and she was all depressed.
So then We go on our Class Trip to Washington DC! It was a Blast she didn't piss me off too much just she would sometimes leave me or other people and It hurt me like she thought I was Boring. We get back everything seems Okay. We join Tennis Together But she didn't really talk to me that much. She had to quit tennis because her parents made her and then she just like never messaged me during the summer. I messaged her once in the middle of June and said "Hey girl We haven't hung out in forever I Miss you!" and she says "we still have 2 months of summer left.." I thought It was really rude of her to say but I was like Whatever. Sp I thought I would let her come to me to come talk to me so she could talk to me if she wanted to. And she never did. That whole summer. So then High school Orientation started and I saw her and we smiled I said Hey good to see you I've missed you and we had small chit chat. Nothing like it use to be. Now I know this probaley is wrong But I posted a tweet saying "If a real friend was mad at you they would tell you face to face. A fake friend would do it behind our back" Cause she never gets on Twitter. Then she Unfriended me on Facebook and posted a status saying I guess message your tyna say goes both ways Tessa! I was so Upset! She was my best friend and I lost her. I didn't text her or anything because I didn't she would wanna talk it out with me. So now we just walk past each other in the hallway. She deleted all the photos of us and I just Miss her. Now Taylor the one friend always calls me a B**** whatever chance she gets for posting that tweet. I know those are alot of Negative things but we also had Good times Like Going to Football Games,Sneaking out,She was there for me if I was upset.She made me laugh. I Miss her. Is it too late to get My friend back? Is it even worth trying to get her Back? I'm sorry This is long But Thank You So Much for Reading This!! I really appreciate it!

[Dylan]

Holy fuck I just read all of that. Anyways I normally would try to say to try to re-connect, but you are now in the transition from middle school to high school. I still recommend trying, but there is a big chance you will have completely different friends by senior year. So try to re-connect, but don't be desperate and if she has none of it, just drop it and find new friends, that you could imagine being friends for 4 years and beyond. If she tries to re-connect, just do, but don't try to become best friends again.