Living water does not mean that it is some kind of creature. Living water is flowing like a river or stream. The Jews would baptize using living water and not a tank of water like we usually do. That is why John the Baptist would baptize people in the Jordan River.
Living water is a source of life. Fish thrive in rivers and streams because it is aerated and clean. Stagnate water has little air and is a pool where parasites and diseases can thrive. It literally becomes a pool of death.
You are a reservoir meant to contain the living water of God. The living water must continually flow in you by the Word and Spirit of God. If you were to stop the flow by not listening to God and reading His word, your reservoir of living water would quickly dry up and you would spiritually thirst to death. You would be living a worldly life instead of one of blessings and life from God.
If you were to stop the outflow of the living waters in your life, the world around you would thirst to death. You were meant to water the lives of those around you. You are full of the Life of God. It was never meant to be dammed up inside you. You might be the only source of the life-giving water of God that your friends and loved ones ever see.
Only living water will satisfy the thirsty soul.