Why do girls block a guy?

I got blocked twice from two separate girls recently. One of them I thought was my friend. She’s strange because she told me why anyone would hate me even though in the end she blocked my phone number. Is it because I’m a single guy and she had a boyfriend? We never argued or anything. Did she had feelings for me because I did told her I liked this other chick? Then the other girl who blocked me was a girl I met online. I thought we were getting along good until she blocked me out of nowhere as well. I didn’t say anything offensive, I was just being friendly. Why do girls block guys?
Why do girls block a guy?
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