Is your friend experiencing depression? Because it really sounds like she’s depressed from what you’ve described (depression includes getting irrationally angry, pushing people away, projecting your own feelings onto people, which would be her getting mad at you and saying you’re doing the things she has actually done). It may be because her boyfriend broke up with her and perhaps she’s not handling that well or it may be a long-term thing given that she didn’t really seem happy when you were younger either.

If not, at the very least, it seems you two have become very different people who aren’t really compatible in a friendship anymore.