<human>: Could you distill the essence of the text into 1-3 sentences?

As the title says, my ex lady split with me after 5 years. 2 weeks ago she was at a pre wedding party with her female friends, I booked a spa day for the following day as a surpise for us, she often stresses about money, I said I would pay and she could pay me back whenever, or not at all, it was just a nice thing for us to do. 

She agreed that night and said she was grateful, the following day i rang her asking for a time she would arrive at mine so we could leave for the spa, she wouldnt give me a straight answer, i got frustrated, as did she, I was trying to do something nice for us and to spoil her. This frustrated conversation turned into an agressive one and we both ended the call literally telling eachother to fuck off, and her snapping and saying she doesnt want to be with me anymore.

Anyway, I can understand an irrational snap decission while annoyed, but it has been 2 weeks later, and i have sent out olive branches, not trying to get back together, but just checking shes ok, and she has replied with one word answers and has treated me like a stranger.
<bot>: How can a person you exchanged your love for eachother everynight via text or phone conversation suddenly go from that to cold shoulder and/or treating you like and absolute stranger