<human>: So, we met around 3 weeks ago and started out great with each other. We'd whatsapp each other daily, about school and life and personal stuff. We'd go for lunch and dinner together every school day, until 8-9pm then we would go home. 

So on week 2's Saturday, we chatted a bit here and there since she was working. Then she asked me if I wanted to meet her after her work for dinner, which I gladly accepted. We shopped around for awhile, ate dinner, took the train back with her.

Then this week came, basically like any other school day, except on one day, she asked me if I wanted to take a detour from the usual bus route to school and meet up with her and walk to school with her. I did not went to meet her since I was already in the line for another bus. But, the next day, I went to meet her, also bought her a cup of her favorite coffee. I've asked her to meet for dinner yesterday but she didn't want to since she was sick. I've also offered(texted her that) to treat her to dinner, but it seems like I've made the wrong decision to tell her that and should just pay when the bill comes.

I like her a lot, but it seems that it is too soon to confess to her. We are only in the same class for this current semester(6months), then the classes will shuffle, which means we are likely not to be in the same class again. She also calls me her bro which I'm unsure whether I'm getting friend-zoned already or not. I think I'm making it obvious but she doesn't seem to get it, the majority of the class knows that I like her and some of her personal friends too since I told them.

So I'd like to get some advice on what I should do to progress now. I also need help on what to converse with her (I'm quite an introvert, she is an extrovert.)My friends said to hint her more, and surprise her.

Condense the text into a few key points
<bot>: Crush, 3 weeks -> 1 month, got close, like her, don't know what to do to progress, I am introvert, she is extrovert.