Additions welcome.
  1. Even when you're part of a couple, spending time by yourself is important.
    It makes you a better partner.
  2. Becoming part of someone else's family is challenging, even if everyone is great.
    You've had your entire life to learn how to be part of your own family. This is like learning an entirely new language.
  3. Sometimes it's not enough
    Suggested by @LevNovak
  4. The really weird part is how it's like the black magic in The Craft where any mean/cruel thing you put into your relationship is going to come back to you three-fold.😦
    Suggested by @videodrew
  5. The way you love each other is most evident in the way you argue.
    And how, in turn, you solve the conflict together.
  6. It's OK if you don't like some of their friends.
    They don't like some of yours.
  7. There is joy in taking care of each other in small ways.
    Setting up the coffee at night so it's ready for the next morning; buying their favorite brand of toothpaste; folding their laundry before it gets wrinkly. These things hold real meaning.
  8. All anyone really wants is to feel understood.
    Even when you are furious, it's worth attempting to understand where the other person is coming from. It's the only way to make progress.
  9. If you want your partner to do/stop doing/change something, you have to communicate.
    Unfortunately nobody is psychic, and it doesn't make it any less meaningful if they don't think of it first.
  10. Love is a noun, but it is also a verb.
    To sustain the noun, you have to practice the verb.