How to describe love? There are talks about love but talking is nothing compare to the experience of love. Compassion is sympathy, considerate and full of kindness which is the result of overflow of love.
It is very rare to meet people who are overflow of love with compassion. There are some relaxation method especially passive meditation will let you have glimpses of love fulfillment, however, love and compassion does not come in hand-in-hand. Here is a story:

Yuuka great-grand-mother was a very remarkable woman. She had seven kids including Yuuka’s grand-mother. Yuuka’s great-grand mother had lived a beautiful life since her children provided well for her. But there was one particular problem with Yuuka’s great-grand-mother, she always used up her last dollar every month providing for strangers, beggars on the road. No matter who ask her for anything, as long as she can she will provide.
One day, a guest who is a beggar was invited to her house to stay for the night. Nobody in the entire house is willing to share a room with the beggar. Yuuka’s great-grand mother took the beggar in, all the relatives are so worried, so they sent Yuuka’s mother to look after her great-grand-mother. Her mother could not sleep the whole night because she was very worried – there is a stranger (a beggar) who stays in the same room.  Yuuka’s great-grand-mother died before Yuuka was two. All the relatives including Yuuka are with her when she died. At the very moment, the overflowing of her love rush into Yuuka, Yuuka feel like suffocating, she cannot breath, cannot hear, the only thing she remember is a very bright light. The whole feeling was behind Yuuka’s unconscious mind, until she met a master in her twenties.
The master was a disciple of a great master. Eventually, Yuuka knows that she actually feels the benediction of love overflows from her own great-grand-mother. This is the greatest love that the great-grand-mother had left for her children, grand children and great grand children while taking care for strangers when she is still alive.

This is a true story that happens in real life
Love is illogical, without reason. Any love that demands return is not love. Love is happening when the person is full of love. Love is indescribable. You know it only when you experience it and understand it. You will experience it with your heart not your mind. Love and compassion are divines.
Love and compassion follows when the mind is relax and the heart follows with great trust. Heart does not believe, heart only trust and experience.