i went through a lot last year, so my way to deal with it was with arts and reading.
i went out, bought myself a $90 cassio keyboard [on sale l0l] and taught myself slow sad songs to play on it ahaha. then i asked for an easel and oil paints for christmas and i got it so i started painting a lot. then i bought my own stereo so when no ones home i blast some screamo or some dance music or some sad songs you could just cry to.
i still use these methods l0ll. ^-^
I'm sorry to hear that.
What I do, is I do everything I love. I talk to my friends. I get out of the house. Find a new hobby. Anything but talk to that person for a while.
Dude, I know exactly how you feel, for I just got dumped recently as well. Surround yourself with your friends, and keep yourself busy by making plans with them, or doing little things to make yourself feel better, like what industrial suggested, give yourself a makeover. Remember it's good to cry, so don't feel bad. Trust me, I cried many rivers over that boy, and I felt stupid for it, but it made me feel so much better. Also, don't be afraid to talk to someone about it, that helps alot too. If you need anymore advice or just want to talk, hit me up, I'm all ears :D