Friendships and balance
I think it is impossible for all of a person's needs to be fulfilled by one significant other who you happen to fall in love with. The chemicals kick in... infatuation, love, madness, whatever you want to call it. Then slowly wears off and we are left to see what's left. Are we moved by the same music?, the same art? Do we relax and laugh together? Do we share dreams? How do we each envision day to day life? Do we want kids, and do we mostly agree on how to bring them up? Are we mostly in agreement or in battle? Can we talk and argue and make positive changes in our relationship?
In the midst of all of this and in the chaos and swings of everyday life, we are meant to find intimacy and understanding. Some couples find it easy to joke and laugh together, or fall into a natural intimacy. Others value the same relaxations, maybe drink some wine, play some cards. Or go dancing together. Some meet with mutual friends regularly. Not all have the luck that these things come easily; for many (I think) it is about working together and continual compromise.
Outside of this jangly embrace, I believe people need to have friends outside of their "significant other" who they can relax and laugh and vent and have fun with, outside of all the burden and pressure. And some friends who they share a trust and intimacy with. These friendships should be nurtured and treasured, no guilt should be associated with them. We should mark are calendars regularly to arrange escapes from the weight and stress of daily life. We need these friendships to stay sane, to stay in love with life, and to give our partnerships/marriages a fighting chance.