You proceed from there

As a natural introvert my daughter says she needs regular intervals of time alone away from her boyfriend who does not share that impulse even if he respects it. 

In retrospect I look at my own life within the confines of a relationship and know there is a tendency to find a baseline routine and then stop reflecting beyond it. The couple stops tweaking the formula and asking themselves whether it works until one day someone speaks out in frustration and possibly wants out.

There is no perfect formula of course but thinking that couplehood fixes your problems is a fallacy. It challenges your preconceived ideas and how elastic your compromise is and if you are lucky helps you erase your blind spots.

I tell my daughter and Ben that they must create their own recipe which disregards how others live. You negotiate the terms in advance knowing what makes you tick and isn't open for discussion because it violates who you are as a person. You are both good people but different in ways which must be respected.

You then proceed to build a life from there.