First of all, love must be true.
Truly loving people will never have the idea that a partner can cheat on them, because they know for sure that the partner will be good only with them.
In the same way, the very thought of changing - does not arise.

Love should be understanding. Partners are sympathetic to each other's shortcomings and advantages, support and help in any endeavor, they are the closest people themselves - in everything!

Love should be forgiving. A loved one can be forgiven for any mistake, any miscalculation and even a deliberate action if it was committed out of ignorance.

Love should be comfortable. Loving people can talk incessantly about everything in the world, or they can be silent for hours, walking in the park and holding hands or watching TV. Loving people feel comfortable even in a hut under a tropical shower.