what do i do?

I’ve recently become not so social. Quarantine made me realize who my true and fake friends are. Currently my best friend is my sister which i think speaks for itself. I began hanging out with an old friend and it was fun while it lasted. I devoted my weekend plans to hanging out with her but she ended up not responding to my texts and left me hanging for 4+ hours two nights in a row. I spent this weekend in my room waiting and then found out she was just ignoring my texts and hung out with other friends. What should i do about this? Should i continue being her friend or confront her?