<human>: Can you condense the text into a few key points?

I met this girl a while back where we work. We've been going out at weekly on 'dates' for four weeks (and seeing each other on non-official dates). At the end of our last date (last week), I kissed her (and yes she kissed back), but since then things have been different.
I have asked her to hang out or just generally catch up but each time she's been 'busy'. She hasn't initiated anything herself since then. Yesterday we worked together and really, it was as if nothing was going on between us...we just chatted normally/small talk.
Basically, I am going out of my mind and I do not know whether to just go over to her house and tell her to tell me where she wants to go with this. Then again, I am not sure whether this is a good idea. All I know is I am going out of my mind and it is causing me plenty of anxiety :(.

Further information: She was in a one-year relationship which ended right before she met me. We're both studying at university.
<bot>: She appears to have been slightly avoiding me since our last date. Not sure whether to just confront her or let it go. I am extremely anxious.