Did I do something?

I and this lady have been hanging out. She told me earlier that she is enjoying her single life and does not want a relationship. After several weeks, we'd hang out at mine Netflix & chill. I'd visit her at her apartment. In last couple days I was unable to leh her come over. Her replies had changed as though she is upset with something. Haven't seen her in 4 days. She called me last night to ask how am I doing because I didn't show up to a mutual friends celebration. I told her we need to talk. I want to iron things out and understand why she's acting so, we are enjoying the moments I thought she did. I also asked her out for breakfast Friday morning and she said she got things to do. Knowing how she is I know that wasn't the case What do y'all think, what should I emphasis on when I meet her?
Did I do something?
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