From past experience I would suggest surrounding yourself with good friends and family. It will take time, but each time will get better and eventually, you will find that you have moved on. The worst thing you can do is keep to yourself and become depressed.
It all starts with moving forward. Get up, put one foot in front of the other, breathe and move toward something rather than away from something. Now is the time to find out what you really are made of. As Talico said, spend time with friends and family. Volunteer! It's really hard to stay depressed when helping others who are far worse off than you are.
Ice cream has always helped me.
I don't think I've ever fully gotten over being dumped. I do think you learn to live with what happened and try to make yourself a better person for the next person you date. I think my parents used to tell me that being dumped is like a battle scar. Everyone has one, it's how much you show of it that affects your daily living.
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