Just because you get serious with someone else, dosen't mean you should abandon the friends who meant so much to you, for so long.
The most likely scenario is she had him by the balls, and she didn't care for Daahan and his other 3 friends. So she told him to stop hanging out with them.
He listened to her, like any good man who knows that the probability of getting laid was directly proportional to how well he obeyed her, and stopped associating with them.