...didn't have to work so hard.

I appreciate all my dad's hardwork and his committment to his family, but I wish he didn't have to work so hard.

Time, once lost, you never get it back.

...took the time to know my friends.

Rather than being overprotective and making assumptions about my friends and ultimately who I was, I wish my father took the time to know my friends.

In knowing who your children's friends are, you will know your children better.