Hey guys! Here's my story: I'm in college, 20 and there's this girl I approached about 3 months ago but she didn't really seem interested. However, about a couple weeks ago she approached me and said she wanted to "apologize" for not showing any interest before. Now that I was 100% sure that she's attracted to me (I saw IOIs obv, and whenever her friend sees me she smiles or giggles especially when she's with her). The girl is like a 8.5, more on the cute side and she has guys drooling all over her. Anyways, I got her number and started texting her just as explained in the PUA community, in other words, I played it cool unlike an AFC. So, I set up a first date with her, and we go for it. The problem in the first date was that there was absolutely no kino involved, I know I know! My bad, sorry. So, we texted for like a week but not continuously since I'm not needy. Now, I'm trying to set up a D2 but she does not seem to be that interested. Whats confusing is that she was fine until a couple days ago when I asked her out but she said she can't make it since she has classes in the evening (and I know she does, we're in the same college duh). So here's how the recent conversation was like (all I did was ask her out without listening to any of her b.s):
Me: You any better yet? (She was sick)
Her: Hey, yeah I feel a little better now since I slept for like 8 hours.
Me: That's how much I sleep almost every night. Anyways, are you good enough to go for dinner?
Her: Well depends when

because I've got an exam tomorrow.
Me: I wasn't talking about tomorrow, lucky you. How does day after sound?
Her: I'll let you know

Me: I'll be waiting
I know the last text was lame, and I've learned my lesson, besides that's how everyone learns. I haven't gotten a reply yet and also she's ignored a few texts before too but that could mainly be because there wasn't any need of a reply for those texts. What do you think of this one? Is she playing hard to get? Also, I have her in one of my classes, how should I act? Should I sit with her or with my friends instead?