Confused..

How long has it been since he stopped talking to her? TEll your friend to move on since clearly the guy isn't really into her. Some guys are inconsiderate like that, just leave you hanging just because they can't bring themselves to break it off properly with your friend. If she wants, she can attempt for one last time to talk to the guy for closure but I wouldn't be counting on that too much.

Ask her if she really wants to continue a relationship with a guy who will not face her when a problem shows up. Tell her, she really needs to think about life with a fair weather guy instead of looking for one that will stick through thick and thin times.

People have their choices and if that guy stops dating her maybe he has some problems or he wasn't really dating her..get what i mean? I feel sorry for your friend. Just calm her though and help her to live her life forward..

Some guys are like that, they will date for a few months and suddenly stop. Maybe, they are just up to something/busy but at least the man will communicate to the girl. As some guys give a test to the girl to know if ever they will have a chance to that girl, but some have a small patience they can't wait for the sweet yes of the girl.