Girl's Behavior

Why did my crush set her insta from private to public?

She has a boyfriend but likes me and flirts with me. Body language doesn't lie. Recently the sparks between us were flying high. One day I was going to ask her out but then she mentioned her boyfriend which she very seldomly does. I then left home. The day after you could feel the tension between us. I had the impression she felt a bit guilty and again all of her body was screaming I want you. Not so long after this she switched her instagram account from private to public on which you can see pics of her and her and her boyfriend. I don't see any reason why she would do that but to make me jealous or could there be another reason?
Why did my crush set her insta from private to public?
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