This is a work in progress, as I am not sure whether one can extrapolate this conclusion to everyone.
Nothing is more destructive of warm relations than the person who endlessly “doesn’t mind.” They do not seem to be a full individual if they have nothing of their own to “bring to the table,” so to speak. This suggests that even those who know that they are best and most fully themselves in relationships (of whatever kind) need a capacity to be alone, and probably at least some occasions to use that ability. If you know who you are and know that you are relating to others because you want to, rather than because you are trapped (unfree), in desperate need and greed, because you fear you will not exist without someone to affirm that fact, then you are free. Some solitude can in fact create better relationships, because they will be freer ones.