Yet it is also one of the most vexing preoccupations in many lives. People suffer disappointments and think this is the fault of love. Disappointments have to do with things not being perfect, with things not matching. It's hard to get things to match even some of the time. But that has nothing to do with love.
Love is all about continuing to try to get things to match.
If you love, you'll continue to do that, even if that sometimes means sacrifice on your part. That's all right. Hurt and pain come as part of life. No one is exempt from it. But that is no reason not to love.