Miner, I understand the sadness you and your family are living with now that your dad is on the other side and you don't see him. It's a shock at first isn't it? (I lost my mom in 2000 and my dad in 2007).
Please understand, my intention here isn't to annoy or offend anyone but I do want to share my beliefs about this, just in case it might ease your mind.
I believe that your dad is a spirit/soul who is just fine, and can hear your thoughts, knows your love, and is with your family. You can talk to him, still. Tell him what you want him to know. He'll hear you.
He'll also greet you when you pass over to the other side, just as other souls were there to greet him, when he passed over. Your love for him and his for you, will never die. Just the body, the shell our spirit inhabits for a while, dies. I found peace and what I believe were replies in my head, from my mom and dad, when I talked to them. I still do.