Have you ever really considered whether this is possible? If we're honest, most people agree that relationships have some sort of conditionality, but is this correct?
By "unconditional" love, I mean a love that does not distinguish people due to individual distinctness (personality, ethnicity, intelligence...) and that does not truly aim at selfish, privateusage of the other person. Pure love should be universal and mutually joy producing.
How might this actually happen though?
Micah 7:18 has been a profound verse for us in the past months, "Who is a God like you who...delights in steadfast love." The way we love unconditionally is by delighting in such a love. When this kind of love brings us joy or delight, then the love is not conditioned on the object of our affection---we simply get a kick of living, regardless of who gets to benefit. IS this not how our Lord sustains His love--whether Jew, Gentile, rich, poor, male, female..... He delights in the glory of His own nature. When share in that same joy--displaying and depending on His glorious nature--then our love with be unconditional and without end!