Hello, I'd like to help you with your question.
If your father touched you inappropriately at any time, then it is sexual abuse. And when someone is open to abusing a child, it usually means they were abused themselves in some way or they witnessed someone being abused, usually a sibling. It is extremely rare for anyone to just decide to become a child abuser. There is almost always some type of dysfunction in their childhood that causes them to cross that line.
Your father will not die from how he feels. People cannot die from the emotions they feel. They can get so upset that they feel ill but unless there is already a preexisting condition that would have already caused them to become ill, then it is only going to make them feel bad. Your father may feel shame at what he did
, which is a good sign. It means he knows it was wrong and there is a chance he will deal with the root of what caused him to act that way.
If at all possible, consider suggesting counseling for at least you and your father if not the whole family. When sexual abuse occurs in the family, it not only hurts the person it was done to (you) but it can also hurt others who may feel they should have done more to stop it or intervened somehow. Counseling can help everyone voice those emotions and work through them. But most importantly, you and your father can work through your relationship and deal with the aftermath of what occurred making your relationship better.
I hope this has helped you,