You become responsible, forever, for what you have tamed.
The above is a quote from the book The Little Prince, by Antoine de Saint-Exupery. It's talking about how, when you become close to a person, when you develop a relationship, a connection, when you give parts of yourself to each other, you become responsible for that person.
This applies to any relationship, romantic or otherwise.
We've been watching a lot of Japanese anime and drama the last couple of years, and this seems to be a recurring theme in many of them. The fact that, when you are in a relationship with someone you can't simply act as if you are autonomous. You can't do whatever you want, you must depend on each other, and you must realize that you are responsible for the other person.
I feel like this is a really important part of relationship that we often miss here in the U.S., because we are taught independence and autonomy to the extreme, at the cost of everything else.
It's important to know that it can be good to depend on the people who you love and who care for you - for help, for advice, for comfort, for companionship.
It's important to know that you can't simply make major decisions as if they only effect you, because you become responsible for the people close to you, and what effects you effects them. This also means that you have to bring those people into your life and have their input and encouragement and that you must walk together with a sense of purpose.
One only understands the things that one tames,” said the fox. “Men have no more time to understand anything. They buy things all ready made at the shops. But there is no shop anywhere where one can buy friendship, and so men have no friends any more. If you want a friend, tame me...