How long does it usually take to propose to someone?

My buddy Sean has been dating this girl Lina for 3 years. When they first started dating, Sean said he was gonna propose after 8 months and marry her after a year. Now, after 3 years he still hasn’t even introduced her to his parents or any family at all. What’s your next on that?
How long does it usually take to propose to someone?
How long does it usually take to propose to someone?
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