He became Muslim and he has kaafir friends
Question

                If you had non-muslim friends before you became muslim, can you remain friends with them? or do you befriend only muslims?
Praise be to Allah.We put this question to Shaykh Muhammad ibn Saalih
      al-‘Uthaymeen, may Allaah preserve him, who answered as follows:
 He does not have to (cut off ties with his
      non-Muslim friends), so long as they are not causing him any harm. But he
      can withdraw from them gradually. He should tell them about Islam, because
      if they see that he has become Muslim, they may become Muslim too. And
      Allaah knows best.