You’ve misunderstood the point, looking at it half-way, a bit too self-focused.
Marriage calls - daily - for heroism, self-donation, “kenosis” in the Greek, self-emptying.
Ideally, the love (and read this as costly happy sacrifice) that one spouse gives to the marriage…assuming a lively prayer life, frequent and good use of the Sacraments, a life of “practicing” all the virtues, will “spill over” into the marriage, and spur on growth in the other spouse to be likewise.
But “looking for” such reciprocity, however, is already to miss the point, and to fall back into “self-seeking”
Jesus loved us with a pure love, not demanding or hinting or “conditionalizing” His love, waiting for us to give in like manner.
And we need to use the “means” that the Church gives us to learn how to love with the very heart of Jesus.
So I reject your point.
By the way…people “half-understand” the idea of unconditional love.
We need to love GOD, and others…without placing conditions on our self-gift.