Those with Bpd could you tell me if this is normal behavior from people diagnosed with the disorder?

My best friend has been diagnosed with Bpd.

She always blows hot and cold with everyone. It does become draining.

I've always been there for her and made many sacrifices for her. She always seems to cut people off.

Out of the blue, she has suddenly blocked me and I have no idea why. It's really devastating. Is this normal behavior from people with Bpd?

Those with Bpd could you tell me if this is normal behavior from people diagnosed with the disorder?
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