oooohhhhh. i think he's very much aware NOW but, back when they first started working together, he wasn't cognizant at all. he probably had awareness of the signs (giggly, uptick in heartrate, wanting to be physically close to him) but he probably didn't even think that calling it a "crush" was an option. putting my tinhat on, he certainly saw hao and hanbin interact a lot and then had a lightbulb moment where things clicked for him. (have you seen this boy fall over laughing, even when hanbin's not even trying to be funny?? STAND UP!)