This girl and I have been texting nonstop for four days straight - Is that a sign of interest?

Ever since Monday, besides when she's been at work, we've been texting each other all day and all night until one of us went to sleep

I mean I text my friends a lot but I've never had like a four day long conversation with someone before
This girl and I have been texting nonstop for four days straight - Is that a sign of interest?
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