Having your heart broken is like having your wisdom teeth taken out.
On the first day, you vomit blood, can't move and the pain is excruciating. Because you know, you've had something torn out of your body. Of course it's going to hurt.
For the next few days, it's hard to eat, talk, or do anything except sleep. It still hurts. You end up doing odd things to compensate for your pain, like solely eating disgusting jelly or ice cream instead of normal food. It's not much fun at all and you feel pretty miserable and sorry for yourself.
That's okay. Everyone feels like this when it happens. It's all part of the healing process.
But after a while, if you take care of yourself, the pain subsides. You're able to move again and do the old things you used to be able to do. The pain is still there. It's more like a dull ache, but you're able to do things now.
The pain doesn't last forever. It goes away more quickly than you think. You never forget it, but it doesn't hurt any more.