how can I friend doing ?

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Yesterday when I read my best friend's Blog, I know she once again confused, all this year she is full of tears except one or two month beging love with someone, at the early of this year, she parted with her boyfriend first time, then later on another boy give her most warmest care and love,after a stenghten aspair after my friend,my friend agreed date with him,they watching move, go to see the sea, eat togther everyday with happyness....they do all the lovers do ,and enjoy the days.however, when my friend come back to the school not long (my friend still a graduate student), the boy ask her part with him and don't say anything why, just don't let my friend call him, ask question, and even don't give any other information too, just all is over. how can my friend do ?? I'm so worry about she are cried day and days, she want to go the city to meet the boy face to face, or maybe she want to save it back?? is this value or should her do ??? Is there anybody can give some suggestions?