How long is a lifetime? I have no idea.
How short is a life? I don't know either.
After going through some things, it's just a matter of "do it and cherish it".
She fell in love with him because he was responsible and fit her definition of a man. He chose her because he suddenly looked back after going around in circles.
Don't call the male protagonist a scumbag, and don't say the female protagonist is cheap. If you meet such a person, you will do whatever it takes.