Dear Alana,
I may not be the best person to judge you but since you seem to be quite depressed I would like to give you an advice.
As you have mentioned that it was you who kept on insisting that you hang with Anna, tue problem may be a little space that Anna might be in need of. It’s totally okay on your part to be depressed about the behavior that your best friend has. But probably she herself has some issues that she might not want to discuss with you at this moment. You should probably give her some time and try to hang out with your other friends. And if it’s possible, then you should try ask her peacefully as to what her problems are.
Be Happy!
(Please don’t mind my grammar. English isn’t my first language)