How should I deal with this?

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I have a girl friend, she is my roommate. Today, she went back to bedchamber, suddently, she cried sadly, we asked she why, she said that her boyfriend broke up with her, without warning, she couldn't understand that. At this night, she said to me, her ex-boyfriend said to someone, he still love her, but he could stay with her. So she have no words, just grieve. So, I don't know how to confort her.