What does it mean when a girl does this?

So the girl I work with came in the break room to eat some donuts. She cut one in half and walked away. So I took the other half and started eating it 3 minutes later she walks in and said bruh seriously and I laughed cause she only wanted half of it. Mind you I already ate half the donut Why would she take the donut I'm eating and start eating it🤣. Do she like me? she mentioned one time that she doesn't eat behind people. What would you think if a girl did that to you?

What does it mean when a girl does this?
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