Emotional excitement is the main characteristic that encourages a person to change something in his life. The desire to have something does not encourage a person to act. Only emotional excitement causes us to get out of bed and do something. If you want to understand why you are not motivated to reach your goal, see if that goal affects you emotionally. Are your heart starts beating harder when you think about your goal/dream, or goose skin appears on your skin? If not, then this is not the goal you need to pursue. Find another one that lift you up.