Wii, I lost both of my parents too young. My father had a sudden heart attack and died at 50. Mom was diagnosed with inoperable lung cancer at 54; she died at 56. Loosing a parent is heart-wrenching; but I am glad that you and your dad have the opportunity to spend this time together - he will never be gone from your heart, and you both have time to say what you want to say to each other.
