OK, that wasn't a boss-type fight with the Bullies....That's what I was going after.
On the other points....
1)....Nick has been taking up a great deal of the story right now as it is. Yeah, mostly fights so far, but I remind you this is where you headed this character, as a fighter with lots of experience. I see him as soon becoming part of Tony's "Inner Circle" along with Constantinos and Laurent. Let's get these boss-fights done first, and then see where it takes us.
2)....Think that should be saved for another time, later in the school year. There will be plenty of chances in future chapters, after Nick has more status in Tony's group.
3).....Nick has already met Jimmy, and knows him as "Hoppy".....Even if he were to find out it was Jimmy, he doesn't know who Jimmy is since he knows nothing of the back-history of Bullworth Academy, and most likely doesn't care. Constantinos and Tony are the only students that know of Jimmy's escape, and only Tony knows of the secret cavern. I'm planning on letting one other person in on Jimmy's secret, but it's not gonna be Nick.
4).....Since the other writers generally are against the formation of a new Clique, I'm thinking of more like a loose 'Federation' of certain characters. Since Cliques are built on mutual interests or similar characteristics over time, that is not the case here. I've just explained the back-story of Kurt and the Rockers, for example. The 'bonds' for a new Clique just do not exist as yet to merit a brand new Clique at this point in the story.
Valentine's Day night will be the end of chapter 3. Since we always end each chapter with a full-blown crises of some sort, then it will happen at the conclusion of the Valentine's Party/Dance. I already have the germ of an idea of what the crises will be. Chapter 4 will run from then until Easter.