FWB is starting to ask personal questions?

I just entered a friends with benefits relation for the first time a month ago. Usually we just hook up a couple times a week, and our texts are usually sexts anyways. But recently he's starting to ask more personal questions, like how work is, how I'm doing, how work projects are going, etc...

and it makes me really happy. Am I falling for him? Is he showing more interest towards me? Like is this normal for FWB's or what? I have no idea what to expect?
FWB is starting to ask personal questions?
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