I (m21) need help with a girl (f22) I've been dating.

I've been dating this girl for two months and we've been hitting it off. She told me a month into dating I have to be very patient with her because she's not looking for a relationship or have the right mindset for it, but that's also when we starting making out. (Back story: she works 45hour weeks and has 5 300 level classes).

Fast forward to last week, we had a great date and ended it listening to music in my car as we both started drifting into dream land. Then I tell her she should probably leave, I wanted her to get home safe. She texts me later that night "<3 night night!"

The next day, I go to Vegas with my best friend and me and the girl were sending playful texts. I tried calling her that night but she didn't pick up. I thought she might be working so I didn't think anything of it. I send her a text two days later that says "hey how's your day going?" she said "It's fine. Yours?" In which I told her "a stamped of girls just charged me at work looking for the bicycles. Picture this, 30+ 12 year old girls laughing really loudly, it was their battle cry!" and she didn't respond. Kinda weird. The next day I send her a playful text that basically said hey lets go hiking this weekend. Again no response.

I see her at school (we met in class) the next week and once the class was over she left with her friend so I followed them and as they were about to go up stairs I said "Hey girl I'll see you Thursday". and a little bit after that I texted her saying "hey...is everything fine?" and she replied saying "Yeah everything is good. Just catching up with friend...why?" in which i said "just making sure everything is good" On Thursday I got to class early and sat where I usually sat but I was studying and She either walked past me while I was focused on studying or didn't show up.

Yesterday I sent her a text "hey you, want to meet up this weekend" again no text.

What did I do? We were having fun and now she's ignoring me. Should I text her whats up?