Is our friendship over?

We’ve been friends for about 6 years now.
We used to be really close in high school, but now...
-She rarely texts me (I’m mainly the one texting her)
-Once she hasn’t responded my texts after a few days (I was gettinh very worried and texting her because that was unusual of her) and she respond by saying she was busy with school, but she didn’t apologize
-She only ever contacts me whenever she has issues with her boyfriend
-She claims I’m her best friend yet we don’t talk that often
-Whenever I want to go out with her, she always insists on inviting one of her friends to go with us

Should I still talk to her? I feel like she doesn’ t care about me, as a friend.
Is our friendship over?
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