ANSWER:

He must immediately stop all communication with her as it is not permissible in islam to have friendship between opposite genders. 

He is not responsible if she thinks ill of Islam or even as if she commits suicide! This is not his problem. His problem is to save himself from Allah’s wrath! 

I have a friend who is friends with a girl who converted to Islam he wants to stop talking to her because he knows its Haram but he is Afraid she might think ill of muslims or something, is it his responsibility if he stops talking to her and she thinks ill of Islam and muslims or Is he allowed to stop talking with her? (they talk casually and she makes him hear music they dont talk about religion

Character and Morals |