Do I need new friends?

Okay so I’ve had this group of friends since my freshman year of high school (I’m a senior now) and I’m starting to think they don’t wanna be around me or friends with me. Literally almost every time i ask if they want to hang out they ignore me or leave me on seen. Or a lot of the time they’ll all hang out and post pictures and stuff and they don’t even ask me if I wanted to hang out. They basically always leave me out.

They’re all super close so when I do hang out with them it’s just weird because I feel so left out and out of place, kind of like an outsider. Another thing is, they never check up on me but I always check up on them. If one of them leaves the group chat we have I always message them to make sure they’re okay and if everything is okay with them. But when I leave the group chat, nobody does that. They don’t check on me at all in general.

They’re all super close so when I actually do hang out with them it just feels so weird and I feel so out of place, kind of like an outsider because I’m not close with them like how they are with each other. Idk how to explain it but it’s not the same like how it used to be.

So I’m starting to think maybe I should just give it up and find new friends. But it’s hard because I’m such a shy person. I don’t like talking to people I don’t know or just in general. so the thought of having to make new friends gives me so much anxiety. And I feel like it’ll be so hard now considering I do online school and not regular school anymore.

Idk I need opinions badly.