Your father is the most valuable person in your life, no matter his flaws, no matter his mistakes. He may not show love the way you expect, he might be tough, silent, or distant at times, but his presence, his sacrifices, and his silent worries for you carry a weight you'll only understand with time. Honour him, pray for him, speak to him with respect.
Because one day, you'll wish for just one more conversation, one more glance, one more moment.
Value him while you can.