I wouldn't say CREEPY. Bolin and Mako DO live in the arena. It's possible he was just heading out to visit Asami when he saw Bolin skipping away and Korra nearby, so he decided to confront her. 

I didn't rewatch the whole episode, just the clip I needed to get the insight I needed. Korra didn't respect Asami for shit xD

Yeah tomorrow night. Mako and Asami opt to spend the night together rather than be around Korra after what happened, while Bolin and Korra were watching the game, since they'd play the winner of that match. It all adds up. Then Amon takes Tanno's bending.