Dreaming of proposing to someone is a good omen as per dream meaning and interpretation. The dream means you will take a special relationship to next level. It also means you will show courage to reveal something you love and want to do in life. Dreams of proposing to someone also means you will decide to get married. It also means you will get carried away by a situation.
Dream of proposing to someone and you wake up terrified or sad means a secret relationship of yours will be exposed. It also means you will do something in near future that you will regret.
Dreaming of proposing to someone and you are happy means you will have desire fulfillment. It also means you will get into a steady relationship.
Dreams of proposing to someone and you see other people in the dream mean engagement or living together with your partner.
Please note that usually such dreams happen as a result of intense activity on the same subject during day time. Then the dream has no meaning. The dream to have a meaning it should happen naturally without any daytime influence.