Dreams involving cliffs, friends, and significant changes can often reflect feelings of instability or transitions in your waking life. Here’s an interpretation of the various elements in your dream:

1. Cliff: Cliffs in dreams can symbolize a point of decision or a feeling of being on the edge of something important. It might indicate that you're facing challenges or choices that could lead to significant changes.
2. Ocean and Pebble Swimming: Water often represents emotions, and swimming can symbolize navigating through feelings or situations. The pebbles could suggest that you are finding small joys or distractions amidst larger emotional tides.
3. Cutting Off Contact: This aspect may relate to fears of losing connections or feeling isolated due to differences. It can also signify a need to reassess relationships that may no longer serve you.
4. Canceled Marriage: This could symbolize a fear of commitment or a feeling of loss regarding expectations you had about relationships. It might also point to personal growth and the need for clarity in your romantic life.
5. Friends as Corpses: Seeing friends in this state might symbolize feelings of nostalgia or loss regarding past relationships. Their ability to talk suggests that there are unresolved issues or sentiments that still hold significance for you.
6. Helping Friends Walk Again: This part of the dream could signify your desire to help others or a wish to restore past connections. It may also reflect your own journey toward recovery or healing from emotional wounds.

Overall, this dream seems to reflect your emotional state regarding relationships, transitions, and a need for support. It could be beneficial to evaluate your current friendships and consider what changes you might need to embrace in your life. Taking time for self-reflection and open communication with those close to you might help you navigate these feelings.