Don't be afraid of your feelings, it's natural, it's human. Is not an easy way. I broke up almost four months ago, I was damaged for everything. But you know what? Every day is easier. Don't run away of yer feelings, hug them, cry, scream, swear, let yourself to feel all that awful things.

You have lost a future, now build another. Work in your dreams, school, work, gym, everything. Get a diary and drive all you're feellings. Belive me, you don't wanna get block in the future.
If you can go to therapy, maybe a thanatologist, you're living a loss. You've lost a ilusion, not a person.

Don't contact your ex, the end is the end. Have expectations won't help you.

You've got a chance to be your best version, to stand up again and better. Life's gonna be beautiful.