In Buddhism what is love meant to be and how is it shown and can two people love each other?

In some denominations in buddhism there is a conventional and an ultimate reality. So from the conventional point there could be, to begin with, two people so they could love each other. But in the ultimate reality there is only one, so it looks like that there aren't two people moreover there can't be love between people. But if I think about that it seems to be strange that there isn't love in buddhism. So what is love meant to be in buddhism and how could love be practised in the ultimate reality?