Confused

I(21M) like a girl(19F) from my college. Long story short, we became friends and would spend hours chatting with each other(can't meet up in person frequently because of covid, I'm Indian btw)

At some point I developed strong feelings for her and confessed to her. She said she liked me but not in the same way.

Then I started to keep my distance from her(talking less when we meet up and ignoring her messages) because, the more I interacted with her, the stronger my feelings got. At one point, I changed my number altogether and went NC with her.

One day she messaged me on instagram(forgot to block) asking why I was ignoring her. The conversation went something like this.

Her: why are u ignoring me? I want your company🙄

Me: I still have feelings for you. I want some space to move on

Her: it's not fair, do you have any idea how much I'm hurt?

This went back and forth for a while. I just said good night and went to sleep.

What should I do? Should I block her on instagram? Should I listen to her and act like nothing happened?(the rejection still hurts. That was the first time I confessed my feelings to anyone)