Accept that the relationship has ended, and avoid over-analyzing why. You can drive yourself crazy trying to understand what went wrong in the relationship. Likewise, you can cause yourself further distress by trying to get back together with your ex if he's not interested.
Spend time with family and friends. When you're grieving, it's good to be around people who support and love you, especially if you may have lost contact with these people during your relationship.
Avoid the temptation to retaliate. After the break-up, you might still have choice words for your former partner. This can only lead to more arguments and problems. Act civil. It doesn't mean that you have to become a punching bag for your ex, but don't instigate further fights.
Learn a new hobby or skill. Spend your new free time productively, rather than sitting around thinking about what went wrong. Take a class, volunteer or learn a musical instrument. Keep yourself busy.
Get healthy. While a box of chocolates might provide some quick pain relief, it'll only make you feel worse in the long run. Instead, improve your health through diet and exercise. Incorporate fresh fruits and vegetables into your diet for a reduced risk of heart disease and a slimmer waistline. Exercise, such as jogging or yoga, reduces stress, boosts your immune system, and gives you more energy.
Remember that there will be other, and better, relationships. Rarely does a break-up mean the end of your dating life, unless you choose to stay single. While it might take a while to form a new relationship, chances are likely that you will make future love connections.
Allow yourself to grieve. While you don't want to wallow in despair for too long, it's okay to cry and grieve for a while. It's perfectly natural. Crying can make you feel better. As well, you can express your grief through music, writing or art.