The near enemy of love is attachment. True love allows, honors, and appreciates. Attachment grasps, demands, needs, and aims to possess.
Book: Atlas of the Heart
I believe originally from Jack Kornfield:
"The near enemy of love is attachment. Attachment masquerades as love. It says, “I will love this person (because I need something from them)." Or, "I'll love you if you'll love me back. I'll love you, but only if you will be the way I want."
This isn't the fullness of love. Instead there is attachment-there is clinging and fear. True love allows, honors, and appreciates; attachment grasps, demands, needs, and aims to possess."
This reminds me of the concept of Clean Love from The Ethical Slut:
Clean love is love without expectations. Washing your love clean doesn’t require advanced spirituality or weekly psychoanalysis.
You’ll probably never let go of every single attachment—at least we’ve never managed it. But maybe you can let go just for an instant: your history, worries, frets, and yearnings will still be there to come back to when you need them. Just for now, take a look at the wonderful person who is standing right in front of you.
Again, I think it all ties back to the best way to get a good spouse is to deserve one. To love more, to love without expectation, to love just for the sake of it.