Find good friends.
Cry to your mom, if she'll hear it. Schedule dinners and brunches with people who love you, even if your limbs feel too heavy to pull out of bed, even if you know you're going to cry in front of them and come home feeling soggy, drained and bruised. Let a very good friend tuck you into their bed and hold you while you weep.
Find a professional.
He or she will probably say the same things that your friends are telling you, like, "It's better to know about this now than later" but somehow it will sink in differently.
Find someone who's worse off than you are, and help them.
Maybe a sick, abused dog who no longer trusts anyone either. You can learn to trust each other.
Find good things.
Be relentless about this. Feed yourself good food. See doctors. Exercise. Get enough sleep. Get a haircut. Buy a new couch if you can. Make crafts. Try Zumba even if it makes you feel feel like a flailing muppet in a sea of mermaids.
Find the holes in your story.
Why is your heart so broken? Maybe the story you were telling yourself was never true. Maybe you weren't as happy as you wanted to believe you were. Maybe now you can finally stop walking on eggshells all the time.
Find out what you've been overlooking.
Maybe, just maybe, the sweet, deadpan guy you never seriously considered is flirting with you. And maybe he's secretly funny. Maybe you should let him take you to an arcade. Be nice to him, even if you're still trying to quell the banshee inside. He might be just what you need.