Love is just one of those things that we dont where it comes from or how it exists. Bible teach us in Corinthians 13 that Love is the greatest will always remain. Vs4 says "love is patient and kind. It does not envy, it does not boast, it is not proud. Its not rude or self-seeking and not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoyces with the truth. It always protects, always trusts, always hopes, always perseveres. In another scripture it says that love covers a multitude of sins.
Love is the most amazing thing and I remember when I met my wife. The love I felt for her was real, although physically it cant be seen, you know that it exists because you can feel its reality. I can only imagine the Love that God feels toward us. His Love toward us is real and unchanging, His Love is deep, unconditional, so much so that He sent His only Son to die upon the Cross. Although most of the world do not believe in this Love it is real. Real to Him who created us and real to those who believe because we feel the Love of God in our heart not only towards Him but also toward our neighbors.