The benefit of living in a dream world is knowing what you want to make you happy in the real world. Everyone needs a way to escape the world when it gets too overwhelming and that is exactly what you are doing. It's bad if you let it consume your life and you don't take the steps to make your dream a reality. For now though, use it for your benefit so you don't escape to other unhealthy ways of coping. It is good that you can recognize this as a problem, because you know what you need to work on to change.