How soon is too soon to ask someone to marry you?

I am in a lovey dovey mood and I am just asking this out of curiosity. My great grandparents married after two months of dating (and were married for 55 years), my grandparents married after two weeks of dating (and were married for 47 years), and my parents married after one year of dating (and have been married for 38 years in June). I wanted to know how long you waited to ask your significant other to marry you and how long you have been married for. Also, how long did it take you to realize they were “the one”. Thanks in advance for all of your answers and comments.

How soon is too soon to ask someone to marry you?
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