The best way to deal with a break up is to allow yourself to grieve. Crying is okay because it purges. This is a normal process. It is also good to take time to grieve your loss, but not to a point in which you allow yourself to stay in the grief. You may enjoy spending time with good friends and family during this time for comforting. Also, focus on your own goals and endeavors. This will allow for time to heal your emotions.