I want to be careful as you have mentioned you have BPD, I've had lots of friends with BPD so understand how challenging it can be.

People are a free to not like you and actively voice that with others

People are also free to be friends with you and that person.

Those friends should not be inviting you both out at the same time out if respect, but l are still free to do so. And you and that other person are free to respond as you please.

Did something happen between you and the other individual that would trigger their behavior or is it new? Have you tried asking them them why they feel that way?

I felt as though someone intentionally was trying to push me out of my own friend group and no one cared, therefore in my eyes it felt like people were okay for me to be pushed out.

Well that one obviously isn't true. Because as you said yourself:

So I stopped talking to everyone altogether, some people DM me here and there, one person has said “other person was in the wrong”

and

Anyways recently people have been trying to get me to hang out again

People often try to minimize conflict to maintain the status quo. They may not mean it to be explicitly personal against you, but that doesn't really feel better when they tolerate people being shitty to you. It feels spineless because it is.

The question for you is whether they make you feel good enough to try to make space away from the people who make you feel unseen or actively disliked. For me personally, I'd rather be around people who will stand up for me than be around people who are kind of lukewarm and wait to experience those moments when they'll show that they don't really care enough about how things affect me to have my back. That doesn't mean I'm going to cut off people who don't jump to my defense, but the amount of emotional investment they show needs to be factored into the emotional investment I give.

If someone can't stand up for me or at least commiserate after the fact and strongly show that they do actually care, what are we actually doing? Like, it's nice to have casual acquaintances as well as closer friends, but if me being mistreated doesn't register, it's probably going to kind of suck spending time in that group. I'd rather spend that time with people who actively enjoy being around me to the point that they want me to feel comfortable.

Personally, the way I process it is that it's either fuck yes or it's no. It's a waste of time and emotional energy chasing after people who don't care enough to be supportive.

(High functioning BPD here)

Is this friend group worth suffering and working through those thoughts and feelings (you know the ones) that will crop up from time to time? If so, don’t hesitate and reach out and talk it out as soon as possible. If not, friendships do end for everyone. It’s okay not to hang on to things that hurt.

I had a friend group in college that included one guy who always liked to stir up drama. He was always bringing up some imagined slight, then he'd talk to each individual person and convince them, and when he had all his ducks in a row, he'd spring it on his latest victim, and they'd end up shocked that everyone was so offended, and they'd apologize, and there would be tears, and in a few days, it would be someone else.

Near the end of my senior year, he tried it on me, and I just walked away from the group. I ended my senior year still friends with a very small separate group of much cooler people, who I still speak with occasionally, decades later. I haven't spoken to any of the rest since.

Some people are sociopaths who take pleasure in knowing they can manipulate people. Learn to identify them early, and avoid them, and anyone who allows themselves to be manipulated by them.

Do you know why this person doesn't like you? For me the real solution without time travel fantasy would be them taking my side.

Is this a purely online friend group? Or also offline one?

I'm sorry you're having conflict with an ex-friend who no longer likes you and didn't explain why. The only advice I can attempt is to never define yourself by the group you belong to. We all walk alone and there are people everywhere. Some will like us and some won't, for a myriad of reasons. Go party with your friends, even if that one hater is included. You can rise above that petty behaviour by showing the statesmanship and diplomacy that resides within.