Left out? By my friends

I have two friends from primary school and we’ve been a trio since.They both live 10 minutes from each other, but I live 40 ish minutes away. It's been eight years since we've been in primary school and I usually come by train to where they live in London, and we all hang out together a couple times a year. Sometimes they hang out on their own, which is fine because they live near each other, and it's usually just for revision or like study dates, or after school/ on weekends when I wouldn’t be able to make it and stuff like that.

But yesterday, they posted online going out with each other and they weren't doing anything of the sort. It was just like a normal hangout. And as I said before, I wouldn't mind if it's maybe like on a weekend or after school because I live far away, which is fine. But it's a school holiday and they didn't even ask me if I wanted to come, (and they always do ask!!) which upsets me. I’ve accepted ages ago that they’re probably the duo in the trio just due to proximity and convenience; it never really bothered me because when we hang out I don’t feel left out so didn’t really care if they were closer to eachother

I’m confused because this hasn’t happened before to my knowledge. I asked them why wasn’t I invited but they gave me these dry ass replies,,

Me: ‘so why weren’t I invited 💔?’

Friend: hello!

Other friend: 😀

Genuinely wtf do I get from that..

then when 24h passed they just continued sending tiktoks and avoiding my question,, idk what to do