I found this on my new favorite website bouncebacktolife.com. I absolutely love this website because it teaches resiliency. The article below teaches one how to not to obsess but start moving on with their life.
Dealing proactively with negative thoughts and feelings
If you find yourself simply thinking about aspects of the breakup that depress you, and those thoughts are running the same circles in your head, do something active with them – write or talk them out. Write in a journal, on a message board, or send a letter to the BounceBack ‘MyEx Mailbox.’ Talk to a friend, family member, support group or therapist. The point is to do something with the thoughts rather than just thinking them.
Distracting yourself from negative thoughts and feelings
After you’ve given these thoughts and feelings some attention in the ways listed above, work on focusing on anything that distracts you in a positive way. Watch a funny TV show or movie; read a good book or a fun magazine; use guided meditation recordings; spend time with friends and talk about jobs, family, or goals; make lists of things you want to accomplish that day, that week, that month, or that year; take a brisk walk or go to a yoga class; clean out a closet. The key is to do something that will help you feel amused, relaxed, loved, energized or accomplished – all of which will create positive chemistry in your brain.
If at the end of the day you find yourself alone with those sad thoughts and feelings again (which is likely), try simply accepting them. Remind yourself that you’d have to be superhuman to not feel sadness after a heartbreak. Congratulate yourself for making a real effort throughout the day to deal with and distract yourself from the sadness. Think about your support system. Remember that tomorrow is a new day.