21M here
There is this girl that I met at uni, and we really clicked. We've hung out 4 times so far in the span of 2 weeks and every time it was awesome. We talked a lot about everything and she seemed genuinely interested in me. Yesterday I asked her for a night walk today and she said yes.
I was planning to escalate, however last night she sent me a message asking if she could tell me today whether she can come or not. I said okay since we are in the middle of exams and if she can't come I'll just stay home and study. We were supposed to meet in a few hours but she still hasn't said anything.

On the one hand, she might just be stressed about exams or has some unexpected family business, but on the other hand I am thinking what if she found someone else for tonight. I know I should've just said that if she is busy we can do it some other time, but it's too late for that now. I just feel like a little cuck waiting for her text.