The words never and ever are very closely related, and for example, you could say, “You will never be my friend.” The words never and ever are put together to explain that it is not happening, period. It is a powerful stance against or for something. Ever means always, and at all times, and an example of this would be “she started learning ballet when she was four, and she has been dancing ever since.”
Happily ever after is a term often used in fairytales. For example, “Cinderella and Prince Charming fell in love and lived happily ever after.” Never is an adverb, and never means at no time, not ever. For example, you could say, “My Mother never disappoints me.” It means not. For instance, you could say, “She always tries to quit smoking, and she always goes back. That gum will never work.” It means to no degree. “She is never going to give me the benefit of the doubt, no matter what.”