To dream of a proposal represents a permanent decision or commitment that is being considered. The potential for a change. A person or situation may be asking for more commitment from you. A significant new opportunity or change is presenting itself. Doing everything you can to secure a situation or relationship for the future.
Alternatively, a proposal may reflect your feelings about marriage or a long-term relationship. If you are being proposed to, your reaction to the proposal may reflect your feelings about the relationship.