i don't know

i am so sad, i don't know what to do. what should i do? do i have to ignore all the sadness? everyday..i keep thinking about the same thing. and i bet u guys know what it is. how can i stop loving someone? how can i do that, when everything in my life is about him.i've made myself busy, but it's not working :'( everytime before i go to bed or wake up in the morning..i miss him.well i miss him all the time... this is so hard, and pretending to be happy is not the best solution. i have to face this but i don't know how.