On this Father's Day, thoughts from contributor Charles Blow about growing up without a dad: I know what it feels like to miss a father, the hole it leaves in a boy where his dad should be. My parents split when I was five. The part of my father that the breaking of our family didn't take, his alcoholism did. I experienced him primarily as an unpredictable apparition who occasionally stopped by in the middle of the night, waking us, reeking of booze, talking loudly and breaking our peace, on