A very common dream scenario involves dreaming that your partner is intimate with someone other than you. Although you may feel that your intuition is telling you something, remember that dreams use other people and their qualities to portray you. Consider the qualities of this interloper and whether or not it might represent an aspect of you that is being explored. As you make changes, you may feel insecure about the effects it will have on your relationship. You may dream of your partner with someone 'new' as a representation of the new you.
Although you may be in a fulfilling relationship, you can dream of intimacy with past partners. At some point in your life - you projected the power for self love upon your mate. It is as if they hold/held the power to make you feel good about yourself. Consciously you may feel that you are functioning independently in a current relationship, but since you dream of what you are not facing, the appearance of an 'old flame' can be activated when you feel uncertain about your value in a current relationship. These past partners embody the idea of self love - they appear as we explore and merge (sexual intimacy) with this potential to love ourselves. This must occur independently from the feedback we are currently receiving. See also Love.