The vast majority of people think they know what love is, because they all imagine it to be the way they want it to be. Nobody cares about the awful truth of meaning of the word.
So, I don't want to simply share my private opinion, like everyone else does. I'd rather consider how God describes love, as He is the One who created love.
According to God, you can't love unless you also hate at the same time. So love must always be accompanied by hate, as one can't exist without the other. The following verse confirms it.
Romans 12:9: Love must be sincere. Hate what is evil; cling to what is good.
Corinthians 13:4-8
4 Love suffers long and is kind; love does not envy; love does not parade itself, is not puffed up; 5 does not behave rudely, does not seek its own, is not provoked, thinks no evil; 6 does not rejoice in iniquity, but rejoices in the truth; 7 bears all things, believes all things, hopes all things, endures all things.
A person who is not converted cannot believe in true love, they may display outward signs of love and do good works. But these are as filthy rags in Gods sight, because can see that their motive for displaying these outward signs is selfish and wicked.
The unconverted people can pretend to love you, but they can also stab you in the back t any moment if they don't get their way with you.
So in summary, Gods Children are the only ones who can love others, I mean love in the true sense and not the type that the worldly, unconverted people display. They only love themselves and everything they do for others is for selfish reasons, in order to gain something. But true love is unconditional.