Dream about leaving your partner for someone else is a harbinger for your lack of trust in others. You are not really expressing how you really feel. You need to rid yourself of negative energy. This is a warning alert for your refusal to accept another viewpoint. Your logic is not making sense.
Leaving your partner for someone else dream is sadly a situation or relationship that is in desperate need of your attention. Some aspect of yourself is in conflict with another aspect of yourself. You do not have full view of some situation. This means a situation in your life that has left you speechless. You need to let go of some project, relationship, person, or idea.
If you dreamt about leaving your partner for someone else:
It is not an especially passionate time, although there could be a lot of flirting and meaningful eye contact. It is best to take this opportunity to make new friends and see what transpires from there.