FWB or something more?

MY FWB actually TOOK ME OUT last night and treated me to a dinner and movie - like, out of nowhere, just for the heck of it, because he 'wanted to'. I wouldn't say it was awkward, but I mean I'm pretty sure I made it awkward at some points lol. I thought it would be fine but there was so much sexual tension the entire night ohmy. Does this guy still only wanna be FWB or is there something more he wants? Any opinions?