Intermittent (fade) — literally - is the risk, danger, or the degradation of the moral, spiritual, physical.
To dream that people or objects are disappearing right before your eyes, signifies your anxiety and insecurities over the notion that loved ones might disappear out of your life. You may feel that you cannot depend on someone and feel that you are alone and inadequate. You need to work on your self-image and self-esteem.
Alternatively, to dream that someone is disappearing suggests that you may not have given sufficient attention to those aspects/qualities of that person within your own self. Have you lost touch with some aspect of yourself? If your lover is disappearing, then it suggests that your love or interest for them is fading.