To those who are recently out of a relationship and want their ex back I'm hoping my experiences with breakups can help you get into a better place. Time and distance are only numbers, they are only important if you allow them to be. As hard is it is to accept right now because you obviously love them dearly, you're not in the place to be in that relationship. You need to give yourself the time you need to get over that breakup. It hurts, believe me I know but look at it from a third person perspective, would you want to take someone back who was constantly crying, pleading and looked desperate? I wouldn't. 
The urge to cry, do nothing and potentially let yourself go might become great but don't slip into that pattern. Eat well, drink water and take care of yourself. Not for them, but for you. Go for walks, treat yourself, make yourself happy!

Can you get this person back? Absolutely! This can only happen once you're happy within yourself, you can't manifest something good if you're vibrating at a low frequency! The point is you come first, they'll get to experience your greatness with you!