If you talk to him to give him dawah and to make him come back to Islam, this is permissible. Otherwise, he is bad news and you must cut him off.

Can you talk to someone who said I left the religion of islam and you were friends before ?

Apostasy | October 31, 2017 6:05 pm
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If somebody makes jokes about islam or Allah etc, muslim or non muslims, and we dont laugh at it. Can we laugh and deal with them, like being around with them if they make jokes about other things?
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If kufr happens during obligatory prayer and one repents after a few second does he have to repeat the prayer? And if a muslim repents from kufr does he have repeat shahadah