Hi haley, Im 19 and my father died suddenly when i was 11. So i know what your going through and it is really hard. But i promise you it gets easier. It really helped me alot to talk to a therapist. And it makes it easier to laugh and remember fun times and share anecdotes with the ones that you love.
Just remember even though he isnt physically with you, he is still in your heart.

hang in there!