To see a lover in your dream symbolises acceptance, self-worth, and acknowledgement of your true inner value. You are integrating aspects of the feminine and the masculine. As a result, you are feeling complete and whole. Alternatively, your dream lover may also be someone who is your ideal. The dream could be compensatory for an unsatisfactory or unfulfilling relationship in your real life.
To dream of an old or former lover signifies unfinished/unresolved issues related to that specific relationship. Perhaps, your current relationship is awakening some of those same issues.