Although my family growing up wasn't strongly Christian, I grew up with similar (if not explicitly delineated) ideas around love. Recently I have been thinking a lot more about love from a slightly different perspective. A group I am involved with has been reading "All About Love" by bell hooks, who, as I have mentioned elsewhere, is a major influence on me, even when I don't agree with her 100%. I have been trying to make my relationships (with my partner, my best friend, the folks in the group I mentioned, my roommate, my dog) more intentional and reciprocal. Where I once thought of love as being monolithic, I now see it as a conversation, kind of like sex (obvs not all sex is based in love, and not all love involves sex)... it is an ever evolving way of relating between two or more people. With my partner, our love has evolved over the decade and a half we have been together. It used to be built on a sense of having to love absolutely, ie I loved her absolutely, and she loved me absolutely, and that was central. In the ensuing years, our conversation has evolved. Our love has actually become more full, but we have also been able to acknowledge that we feel drawn to others, and that finding love in one person and one person only is neither realistic or healthy. That learning has been a hard and (at times painful) process, but we are a stronger couple for it, and a recognition that while we operate as a couple, that the couple-form is not the only form love can take. It is unconditional, but what makes it maintain is that we both recognize that we are flawed, damaged people.
The last punk band I was in was, while being a performance for others and an outlet for feels/emotions/ideas, to me at least was most importantly that sort of conversation, and it evolved and changed over time. The other bandmate who I have known since childhood and I fell somewhat out of love, while not fully losing affinity. The conversation with my now-bff/former bandmate led to a deepening love and affection. That latter relation of love has persisted even now that we live far apart from each other, and it has grown as I've gotten to see him come in to his own in his own romantic relationship, and in his new band. I am somewhat removed, but the sense of love I feel seeing him be the best person he can be is one of the most overwhelming feelings of love I have experienced. I would say it is a transcendent love.
So I guess it depends on the particular love relationship?