Most Helpful Girl
I think your instincts are right. she may have acted happy cause she was flattered. but if she was really into you, she would suggest another specific time, and not say 'maybe'. so just text her 'well when you are free, let me know and we'll go out'. you already asked her out and she said yes. so if she wants the date, it's her turn to make a move and ask you.
if she was interested but rejected the dates anyway, don't let her play with you