Girl blocked me out of the blue?

There was a girl at my gym that I had a crush on. I sent her a request on Instagram, which she accepted, and we ended up talking a lot. We exchanged phone numbers and talked on the phone as well. She used to call me her 'delulu,' but when I asked her about her perspective, she would mostly say that we were just friends, nothing more.

However, I was looking for a relationship. Then, another girl came into my life. She’s pretty, and she asked me to be in a relationship. I was attached to the first girl, so I kept the second girl as a backup. But since I never got any proper response from the first girl, I decided to go with the second one. Unintentionally, I started giving the first girl less attention, and of course, I was committed to the second one. Suddenly, the first girl told me that she had a crush on someone else at our gym (I suspect she was trying to grab my attention). After that, I started ghosting her, not even seeing her texts.

After some time, she sent me a 'hey,' and we had a normal conversation. But whenever she said 'hi,' I usually responded with something like 'bye' 😅—basically, I gave her cold replies.

Two days ago, she talked to me, and I gave her normal replies. But yesterday, she blocked me. I don't want to be a bad memory for someone, but I really don't understand what's going on in her head.

Girl blocked me out of the blue?
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