What does "Maybe" mean?

Anonymous
When a girl says Maybe when you ask them out, what does it mean?

Does "Maybe" mean she is considering it and is inclined to say "YES" but wants to think about it a bit?

AND

Does "I don't know" basically mean she doesn't want to consider it and is basically saying "NO"?

In my specific example:

There's this girl, we give each other a lot of eye contact, she follows me when I talk, she bumped into me in the halls on campus today(Monday), and after we talked for a couple minutes and she was all smiles, I asked her if she would want to do something with me sometime.

She looked like she was about to say yes, then said maybe with a smile. I said, "think about it, I'll talk to you on Wednesday. "(I share a class with her then).

Ladies, what do you think? What does "Maybe" mean to you?
Maybe = YES (unless the guy does something that really blows it)
Maybe = I'd like to say yes, but I need to think about it
Maybe = Completely unsure 50/50 chance either way
Maybe = most likely NO, but I might change my mind
Maybe = NO (just trying to be nice about it)
Select gender and age to cast your vote:
What does "Maybe" mean?
46 Opinion