I just can't read through Doc's expressions. What does he even feel for him? Plus he looke...

I think the Doc likes him, but just is confused/surprised about his own feelings. He's not a committed guy and just does one night stands, EXCEPT with Dojun (he always tries to find a way to see him again). It seemed to me that he is barley realizing now that his feelings are/have been more than just lust and he's kind of freaked out by it because he's not use to feeling that way about someone. That's why I think he hesitated; not because he was lying but because he is barley started to become aware/experience those feelings.