Being left at the altar is read as a fear of rejection at the moment you are most exposed. Dream books take it as anxiety about trust, not as a picture of what lies ahead. Standing alone while guests watch is read as fear of public embarrassment after a big step; waiting and waiting as worry that effort will not be returned. Being the one who runs away is taken as doubt about a commitment you have made or are about to make. If the dream comes before a real wedding, tradition reads it as ordinary nerves. The dream may point to a situation where you have put your heart forward and are waiting to see if it is met.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.