I guess the definition of the word friend is someone you can count on to help you in times of difficulty. For me that would include my father. I don’t think we were always friends, it wasn’t until I left home at 20 to go and work about 180 miles away that I realised or that he appreciated the relationship we had never acknowledged.
One day I rang my father and said help, I’m moving house and I need some assistance. At the time there was no kitchen, I was midway through rewiring the electrics and it was pretty chaotic. I also had a pregnant wife to consider. Without pausing for breath he said he would be there and arrived the next day. Now you could argue that is what fathers do and I hope my children feel they can pick up the phone and I’ll support them in the same way. But to me he was a true friend, someone I could count on in a time of emergency.