Dreams involving significant life events, such as marriage, often reflect your current feelings, fears, and uncertainties. In your dream, the memory loss of your fiancée could symbolize feelings of confusion or doubt about your current relationship or commitment. It may indicate a fear of losing important connections or a desire to escape from pressures surrounding your engagement.

The fact that you were about to marry someone you didn’t know well could suggest feelings of being rushed into decisions or a lack of clarity about your future. It could represent anxieties about making the right choices or a fear of settling for someone who doesn’t fully meet your expectations.

Your interaction with your estranged mother conveys unresolved familial issues or conflicts that may be weighing on you. Her anger could represent internal or external pressures that you feel from family expectations or societal norms regarding relationships.

The presence of your best friend signifies the importance of support and guidance in navigating your feelings. This part of the dream suggests that you value the opinions of those close to you and that you may need help in discerning your true feelings or choices regarding love and commitment.

Overall, this dream may be urging you to reflect on your current relationship, your feelings about commitment, and how external influences (like family) affect your decisions. It might be beneficial to take some time to evaluate what you truly want in your relationship and to communicate openly with those you trust.