Am I right to feel like my friends dont care for me?

This is my first ever time asking a question on this website, so i dont really know how to use it properly. My problem is, that i feel like none of my friends care about me. I have four close friends, who I've been friends with for several years already. we have a groupchat together, and we chat on there regularly. but lately I've noticed that everytime i hangout with them, its always when we go as a group with all of us, never just me and one other girl. I just feel so left out, because all of them constantly hangout with each other and send pictures of what they did together (eg: cooking, shopping, watching movies etc). i do ask them sometimes if they want to hangout, but it always ends in a "maybe" or "im busy". because of that, i feel like they just dont like me/ dont really care about me. i dont know if im the problem or if maybe they just like each other so much more than me. i dont have anyone else i can tell this too, as the rest of the friends i have aren't that close to me, and i dont think they would really care if i told them. what should i do?

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Thank you to everyone who replied to me, i read all of your replies and iv decided that im going to try and talk to them one last time before making my final decision :) thank you for taking your time to give me your advice
Am I right to feel like my friends dont care for me?
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