Does she really want to take it slow, or did she find someone else?

A few weeks ago I met this girl in one of my classes. We started just sitting next to each other and talking, then I asked for her number, texted back and forth a bit (no as much as I wanted), then a few days ago we finally went out. We saw each other 4 times in the span of 2 days, and twice she was the one who asked to see me, or to hang out. The last of the 4 times we saw each other we watched a movie together and cuddled a bit (nothing big, just my arm around her and she made the move to hold hands after a while). I thought that night went well.

Thing is, now she's acting weird, at least to me. Yesterday I text her just asking what was going on, then I asked if she wanted to do something tonight or tomorrow night. She responded with "That would be fine i'm sure. I might be doing homework most of the day, we will see". I suggested we could do homework together, or do something more exciting during the week. She said "haha like what?". I told her we could go on a date to dinner on Monday night. She said "I was kidding, anything is more fun than studying, we will see... Don't wanna go too fast". I told her I understood, since we just started seeing each other.

Tonight she text me saying she was going to a friends to do homework just to let me know. I said it wasn't a big deal, I had a friend coming over anyways, and that we should definitely hangout this week. She replied with "Cool cool, sounds good!!".

I have no idea what to do, and don't know if she's into me still..