Reddit, how did you get over a heartbreak/ex?

I've just had my heart ripped from my chest, shit on and then beaten with a sledge hammer. My boyfriend broke it off tonight after three years. Of course there were problems, but no relationship is perfect. I feel a little blindsided and of course like complete and utter shit. I want to be the person that can get over this but unfortunately I'm laying in bed, on Reddit, with a box of tissues at my side. Help me out, Reddit! How did you do it?!