When you FOCUS on what you do want, you are attracting it to you. When you allow your FOCUS to shift to what you don't want (the fear of not having what you want) you push what you want away from you. That's how the law of attraction works.
Moving beyond indecision, ambivalence, doubt and uncertainty is necessary in order to attract what you want. You do that by dismissing from your mind any thought related to what you want that does not feel good to you no matter how logical that thought might sound to you.