@dk005 Perhaps you can look at it like this: Recall your dad and mother being there with you, and how they would gently guide you/support you. Even think about what they would say to you. And you might find that indeed they are in your heart and mind! They do not always "just leave" you, when you can feel their care and words. I know that is how it has been with my parents, who I lost in 1996 and 2012, myself.

Following your doctors' advice and concern about tobacco use and alcohol will help you, and may make your health less of a struggle. It won't be easy, but looking forward to a less severe situation is what you need to focus on. Doing all you can to help yourself, and remembering your parents' guidance, reaching out to your sister and aunts, will be a challenge. Accept it!
Sending you gentle hugs,
Ginger