What does it mean when a girl starts calling you "boo" over text?

Anonymous
For the record this girl told me twice she likes me but friendzoned me after I found out she just went through a breakup. I asked her of she was still into me when she told me they broke up and she said "Yes I do like you but I need time" she also claimed I came off to strong at one point so I backed away

She did end up texting me first after awhile saying she Hopes I have fun over Thanksgiving break. Around this time she started calling me "boo" it's only happened twice though so far. Just wondering what it means
What does it mean when a girl starts calling you "boo" over text?
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