Girls, A girl randomly turns on read receipts, reads message then never replies, what does that mean?

Been talking with this girl I met a couple months ago and we’ve been talking every day since. I respond to a text like normal and I go to the text to see if she responded and found out she turned on read receipts and left me on read.
Girls, A girl randomly turns on read receipts, reads message then never replies, what does that mean?
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