Love is just a four letter word. That's all love is. Love is not something that you feel or give. Love is just a word. When you "love" someone, you feel passion toward them and you give them yourself. Love is just a word that is given to the level of passion and commitment that you feel when you think about that person. In fact, the dictionary definition for love is strong affection, warm attachment, and great enjoyment. It has no one definition because love is many things. Love is unique to every person. It is what you make it. Love is sacrifice. Love is struggle. But most of all, love is being fully dedicated to one person and being willing to do whatever it takes to have them. To love someone is to keep them in your mind at all times and always be worried about them, no matter what. It is to care about someone more than you care about yourself and to be part of them and them part of you That is what love is.
It's long and complicated but it's the best I can come up with.