How can i get over my girlfreind... need help!!!!?

My name is andrew. i went out with this girl for bout 2.5 yrs. and everyday we spent togtha. all my memories r with her. we broke up because we started fighting and she had huge problems with me joining the United States Marine Corps. I moved to California to get away from everything a week after... I thought my pain would go away. But it is still there. I forgot how to flirt and do everything... i have no clue what to do! lol please help