What could I have done differently?

I went on a date with a classmate last Wednesday, and it went splendid. We agreed for a second date, but university assignments are keeping us a bit busy. She ignores me in the class but chats a lot in private. One of her friends saw us going on a date that day. She is keeping my texts either seen or not responding until a few days. I texted her asking if there was anything on her mind or concerns she'd like to talk about. She is a really lovely girl, and I do not want to lose her. I'm ready to fight to keep her in my life. Please help me. Thank you 😊
What could I have done differently?
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