Here's the full interaction ---->

Day 1:
I talked to this girl for 2 minutes and had such a sexual energy while talking to her I think she got some of that vibe. That night she followed me on Twitter, wtf.

Day 2:
I walk with her to her next class and talk about parties and mutual friends, I number close by saying "We should chill" HB8: "We should." (Successful Number Close)

Text Game

Me: Hey its Ricky
HB8: heyyyy
Me: Guess what
HB8: what?
Me: I'm going to Las Vegas (Im doing a bootcamp with Squattin)
HB8: whaaaat! when?
Me: The end of this weekend
HB8: whaaaat take me with you
Me: I'm too wild for you
HB8: hahaha clearly you don't know me very well

Me (30 minutes later): I like your attitude. Let's grab a coffee or something before I go.

HB8 (20 minutes later): sounds like a plan

Me: how was the makeup Psych test?
HB8: I still haven't done it haaaa
Me: me neither, I need to study for it.
HB8: yeah me too, I have to take it tomorrow morning before she bitches at me again.
Me: Take it on Thursday, that's what I'm gonna try to do. She shud be chill.
HB8: she bitched me out today before I walked into class because I was suppose to take it yesterday morning ahahhaha
Me: She didn't bitch at me at all haha. What are you doing right now
HB8: damn I don't know why she doesn't like me ahaha. I'm on the way to the Festival of Lights right now
Me: wtf, with who. You're gonna fail that test.
HB8: my cousin is dragging out here. and yeah, probably
Me: If you get back before 8:30 or 9 we can study and take the test together
HB8: alright that sounds good, I'm not sure what time I'll be back though

Day 3:
Me (next day): Did you take the test
HB8: nahhh haha
Me: Haha wow, shes gonna kill you
HB8: yeah probably. did you take it?
Me: Nah IM gonna try Thursday, she hasnt bitched me so Im gonna ask
HB8: yeah I'll probably just come in tomorrow morning

Day 4:
Me (next day): Hey hey
HB8: hiiii
Me: I'm craving food, wanna get something with me?

HB8 (10 minutes later): ahhh I totally would but I'm out Christmas shopping right now
Me: K well I'm down for late night hot chocolate

No response

She was (and still may be) interested. Schedule something when she agrees. The next day you started talking about a test or something, try keeping the texting relatively tight to scheduling the meetup.

Weird - I am normally on (around) the same page as you with this stuff OceanX - and I think she's not interested... LOL --- She said "sounds like a plan" and then agreed studying together was a plan... But never followed through... and then offered an excuse about grabbing a bite...

That said, I don't think OP actually did much wrong here... The texts were decent.

I just think her interest may be lukewarm.

I am in agreement that her interest may have waned. But I believe she was interested at the outset.