I ask this girl to hang out and she said maybe?

Gamerfanlol
So I ask this girl out at school she has college classes the opposite days of me I see her once in a while, I ask her if she wanted to hangout when she had some free time when we were both off and she said maybe... Now I am very careful not confuse niceness for flirting but she was smiling laughing and never broke eye contact and we got along so well (unless I'm really slow the past couple times we talk she was flirting with me, busting my balls playing with her hair etc) I really thought she say yes, then I say u wanna give me ur number and u can decide then she tells me she never gives her number out to anyone so I suggested her taking mine and she happily accept. So basically I know the ball is in her court but for future reference when a girl saids maybe what does it mean?
I ask this girl to hang out and she said maybe?
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