Because I asked her what made her late. I was having a lunch for a few friends in my new place. She ignored messages asking should we wait (not aggressive or anything, I wasn't too bothered) finally texted when she was over an hour late - no apology or explanation and just said she would be there in half an hour. Two hours later she arrived, no apology or explanation but did say "I can't believe you actually had food". This was very strange as it was a lunch invite and I do like to cook / entertain.
She stayed around forty minutes then phoned her boyfriend and loudly asked him where he was and arranged to meet him. As I was walking her to the lift I casually asked what had held her up, she spun around and yelled she was so sorry to inconvenience me and stormed off.
She then ignored all my messages and calls over the next few weeks asking what I had done to upset her and saying I missed her.
She decided to emigrate with boyfriend and had a going away party and all of a sudden broke her silence and summoned me on the day of the party for a sorting it out chat. She told me she was far too busy to meet halfway so I would have to come to the party venue an hour before it started. I said sorry but on such short notice I can't, I have committed to stuff today but perhaps we could talk later on or I could meet her tomorrow? No reply. I went to the party, wished her well and left fairly early before the night got messy.
She got utterly hammered, bawled crying to anyone who would listen that I had refused to prove to her by arriving to the party early that I wanted to fix our friendship. Something had happened the day she was late but she didn't want to say what.
I messaged her the next day asking could we meet up and talk. She wrote back saying she had too much to drink the night before and I had my chance.
Ok.
She is back in the country now. I completely avoid her and her drama.