Bolin won't press her if she doesn't go near the topic. In his mind he didn't say anything he feels the need to apologize for but he still wants to be friends and work with her so I think he'll try to keep things somewhat neutral for the moment. Though he knows what she did last night though, and he miiiiight confront her again but he'll probably see how things feel first. If anyone owes anyone an apology it's Korra to...well everyone lol