If it's demanded, it could extend the lunch scene a bit, and it's best they get it all out of the way now so everyone can just accept it later. Botan's status as Kurama's secret lover does make Kurama's distance from other girls make sense, too. And I don't think any of those girls would risk messing with Botan in front of Kurama. It would need to be some criticisms he isn't around to hear. If they did hear about Botan's actions, they'd probably feel like human trash xD

Don't feel bad for an honest mistake dude. At least you're starting over again in a timely fashion. I'd be too fucking sad to do so xD