Congratulations on the Gig. Will you be touring? After 15 years in the theater, I have had more than my share of watching the not so harmonic experience of auditions; friendships / relationships going awry. Fact of the matter is, those few that Are chosen, are not always based solely upon actual existing abilities, but rather what the Choreographers and Directors see as a potential capability / capacity thereof (raw talent). Perhaps your friends are great variety dancers but lack the élan you have. Panache is priority in the performing arts, especially ballet, if you got it, share it and it will grow, fake it and you will go. Capable of getting along with others is a major problem in theater, if you don’t, your not chosen.
You have proven that you are capable of cooperating with others. This is something that is only visible from the audience, not stage left or right. You have obviously proven that you are capable of performing how you are told to in a way that pleases them; others are not going to like it at first because they are looking for someone to blame. So don’t flatter yourself, it’s probably not jealousy, it’s not about you, it’s their issues, don’t make them yours. The very company they once cherished, has let them down, so the whole company sucks and everybody in it, now that you are a part of that company, it’s all your fault. So any relationship problems around this, are probably not your problem, rather a part of the solution in your growth.
Hopefully these feelings will subside in the near future, and they will go on more auditions and find someone else to blame. But what you need to focus on, is the ones who are proud for you, who have supported you and continue to do so. Once you become Gregory Hines or Baryshnikov himself, they will not treat you the same way as they do now, thing is, you must never attempt to retaliate their behavior. - Just remember to be grateful that you are humbly more realistic than that.