But realize too that he's not really gone. Once the pain fades it will be replaced by the fond memories of things your shared. Those will stay with you forever.
I'm so sorry about the loss of your dad. In 18 days it will be the 2 year mark of my dads passing. I still miss him like crazy but the pain is alittle less acute. I don't know if your dad was suffering but mine was and it was a comfort to me when he passed that at least he didn't have to suffer anymore. I wish you and your family strength and peace in this very difficult time.