That’s such a shitty and cowardly way to end something. Let out all of your crappy emotions (whether it be bawling your eyes out, or breaking some stuff), and then heal and move on. Get rid of any reminders of the relationship, spend time with friends, spend time with pets, change something about your appearance (new clothes, a new haircut/colour, etc.), try a new sport/fitness class, listen to some good music … whatever you need to do. Do whatever makes you feel good.