The ditch symbolizes a situation where you allow something to happen in the dream, whether it is good or bad that is irrelevant. Essentially, subconsciously you’re not holding on to anything and as a result everything is just left behind.
The ditch also symbolizes failure and loss of control. Some further interpretations include: panic and negligence in relationships, confronting old habits, recognizing destructive patterns in your life and letting go of negative patterns.
The meaning of ditching someone in dreams can be that the dreamer has failed to cherish their long-term partner or failed to do the necessary work in the journey of love.