Realistically, at what age can I start to question?

Seeing that I turn 30 next year and never had a legit relationship my entire life, when would it make sense to question whether I will ever find a wife and have a family of my own? I am at the average age where my peers are getting married.

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+1 y
In other words, when would you say, "if it hasn't happened yet, there is a good chance it never will."
Realistically, at what age can I start to question?
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