I think "happily ever after" is a myth.
There may be days when everything will be a challenge. Some days one of you may not like him/her self -
You know that saying "love your neighbor as yourself"? If one doesn't love/like oneself, what chance do the ones around one have?
THAT being said - it is important to love each other - I do not think it is necessary to LIKE everything that the other one does -
It's also helpful to take turns being out of sorts -