She's playing games with you. I wouldn't waste anymore money on her until you know she's serious. Here's what I'd do. Ask her out again but tell her you feel like staying in tonight. Order pizza and you guys go rent a movie but you pick it. Now after you eat your pizza and watch your movie just go on with your normal making out. Get her so turned on that she wants all of you and stays the night. Once you blow her mind in bed she will be begging you to hang out all the time. hell she will probably move in with you if you let her. She talks about all the boyfriends that didn't work out because they moved too fast. I say have her prove it physically by turning you down. My guess is she won't if you do it right. I read this as she wants you to take what you want. So take what you want.    Also, if you are serious about her tell her in person not online. Messages don't have the same impact as words do.