Stop buying perfume off Oooooo and spend time with your dad. Buy one of those To My Dad books, sit with him, ask him the questions and fill the book in. What he remembers about your mum being pregnant, what you were like as a small child, hobbies, favourites, look through photos together, laugh, sing, make things together. You can look back on this time and think “I was in denial and didn’t spend time with dad and I wish everyday I had” or you can look back and think “I made the best of times during the worst of times” you will look back fondly if you choose to spend your time making memories.