I honestly don't know what's going on. I'm curious, worried and confused. But perhaps she's just been busy, or hasn't been feeling well.
We went out Monday night, I think it was, and things went really well. She wanted to treat, held my hand practically as soon as she could at the movies, asked to kiss me, etc.
I texted her the next day, and asked her how class was going in the afternoon. She sent a reply.
I didn't hear from her the next day, either. But today, I sent her a message on POF (figured it'd maybe be best because maybe it wouldn't wake her up early in the morning), and it said she was online. I asked her when I could see her again.
Nothing.
Stop and take deep breath!
If your text or message isn't getting a response, you need to leave it there for a while.
I don't like saying this, but from what I can read she is no longer keen on you. Were those two messages (one text and one on POF) the only ones you sent, or were there others you haven't told us about? I don't want to sound like a dickhead, but she is probably getting mixed messages (in person you are very shy but then want to constantly communicate via text or email) from you and so is moving on.
You have been on a date and kissed her goodnight. The next time you make contact with her, ring her and speak to her! This doesn't have to be the next day, but don't send a text asking how her classes are. Ring her, tell her you had a good time and want to catch up again. It's ten times harder for a women to reject you over the phone than by just ignoring text messages. Plus it show you are keen.
I love communicating via words rather than by my own voice too. its why I like neogaf. However, the vast majority of women prefer talking to someone over messaging.
Edit: if you want some direction on your next move, I think you should start looking around for someone else. Not only will it take your mind off her, you may find someone else who is interested. And then you can take what you have learnt from this to have success with someone else.