A girl and I talk often sometimes till late at night?

So we talk often I asked her on a date she said we're just friends only. That's fine... she texts me often till late at night, but after that she became more open.

Other day I was working through the night. She responded to my message at 12 ish. I said I'm still working.

She's like that's not healthy, do you take breaks.

I didn't respond I was busy with the thing. Next morning I responded to Sher but she's leaving me on read.

Did I annoy her by focusing on my thing? I mean we're just friends right?
A girl and I talk often sometimes till late at night?
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