What is Love?

What is love? Is it just a word? Does love really exist? If it does.. what is love?
If u were to ask to sacrifice your life, just to save the love of your life? Will u do it..? If u do, is love become meaningless.. and If u dont, is that love?
I do not understand love, what i know is to treasure every moment that i can. And to give all possibilities of happiness i could possibilties think off. But if u realize there's no ingredient of love inserted from the other party, whatever we do, is that meaningless..? If we stop, again.. is tat love? and if we dont, is that something silly.
As far as know, the other party may not even feel a single drop of care u put in, or the other party is not even planning to put a single drop of feeling into the mixture... Stopping, what is the defination of love again?
There's no logic in love... there's no right or wrong... there's no limitation of love... you maybe the angel but loving the monster from hell... you stop... is that love? you continue... is that right..?
When u love the worst person in your life... and once u found out.. u plan to pull your leg out...is that love?
is it loving someone.. u need to love their weaknesses.. if yes... is tat some contradicting with self expectation.. if no.. again.. it is love..
do think...