Is it time to ditch the online friend group??

I might delete this blog if nobody responds, but...

Usually, I can understand friends falling out and whatnot. I’ve dealt with many, but this group of friends is like the first group of people to really know stuff about me. I usually don’t open up due to not needing much to say or just not being comfortable, but with them, I really trusted and opened up to them even when I had a feeling I shouldn’t. They saw me through a really rough patch and through it all, they were very understanding and were there for me. But as of recently, the group kind of broke up. Two of my friends were in a relationship very quickly after meeting, and I think it’s evident that it’s probably not going to work out. So when they broke up, one left, and the other stayed in the group. Then my other friend started having troubles with my one IRL friend in our group, and then left the group and unadded my IRL friend but created a second group that just has me, my friend, and them. So now I’m handling two group chats where my friend and I are both in. I haven't asked about their reason for unadding my IRL. I honestly don’t want to be nosey, but my one friend who was in the relationship and me have been more closer recently and they've been pretty active on TikTok and posting a lot of mental health videos but like "over-sharing" or "Doomposting" I think it’s called. They've also been posting on their story these rants and ghosting everyone for like 3 - 4 days and coming back acting like nothing happened. The last time they did this, I ended up replying to their story asking if they were alright and they just said “it’s okay we ball" and for some reason I’m unsettled by this. I think it’s obvious the group has been slowly breaking. Nobody ever talks, but it is summer and I have a lot of other excuses to why nothing might be wrong and I’m overthinking it but I would really appreciate some advice and an outsider’s opinion on this whole thing. 

Sorry if it's challenging to identify who is who. ㅠ_ㅠ