Dream about leaving your partner for someone else indicates your lack of respect for someone or some matter in your life. You are trying to suppress it and erase it from your consciousness. Things are not what it seems. This is an indication for your ability to withstand or endure a difficult period in your life. You feel that you have no voice or no choice in a situation.
Leaving your partner for someone else is a symbol for putrid conditions and old relationships
Something is not sitting well with you. You need to approach some situation more slowly. This dream is unfortunately a warning signal for a new approach to a problem. Some negative emotion needs to be expressed and acknowledge.