I totally understand how you feel because I'm feeling the same way. My Dad has been gone 3-1/2mts, 2mts longer then your Dad and I still cry every day.
I was really close to my Dad too,If something came up during the day (good or bad) I would call my Dad before I would call anyone else. But it does get better trust me it will get better. I'm so sorry that your hurting so bad. Give yourself time it's still so new. Feel free to PM me if you want to talk to someone in the same boat. We could help each other.
Michele