What does it mean when she calls me boo?

I have this friend that's a girl we are friends on Facebook and all that I commented on one of her posts she said I got you boo. Does this possibly mean she could like me for more than a friend? She is a black woman and I am white it generally is a black slang term would preferably like people that know about black slang to answer but will appreciate any comments
What does it mean when she calls me boo?
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