Girls, Why did the girl I like walk between myself another girl whilst we were talking?

I was talking to this girl and the girl I look saw us talking. The girl I like just randomly walks between the two of us with no acknowledgement and continues walking down the whole aisle and out again. She didn't look at anything or touch anything in the aisle. She went straight to her locker where she could have easily walked another way to her locker.
Girls, Why did the girl I like walk between myself another girl whilst we were talking?
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