Depends how long you know the other person. I know someone who proposed after 2 weeks.
If you live in different cities you’re going to marry a stranger. How often can you meet? You’ll have a skype relationship. There is a big issue with shidduchim now because we are so spread out and far away. We no longer live so close. Besides, from 1840 the masters have said we are all flawed souls and have issues from past lives.