I know that I read spoilers about this, but I forgot them >.<
But from the promo of 'Run The World', when Santana & Brittany are talking to Kurt and Rachel is present, they seem as though they are still friends. ~ Rachel puts her hand on Kurt's chest to mostra 'hurt'
...but still, I don't know. The scene of 'Run The World' can be from the beginning and da the end, they could have fought already.