How could u did dis 2 her?

i can't believe wat i have heard or experience...OMG! Yong got cancer...When yong told me dis,i was just like very helpless.She was a nice girl,very sincere 2 every each of her friend...oh God how could u do dis 2 her? Girl dun gif up...we will ther 4 u....do wat u promise 2 us n dun let us down...