i dont think time is a factor.... i mean if you meet the right person go for it you cant wait till uni to think tell them
I think its our needs to friendship or making relationship with opposite sex. In my view the right time about to making relation or something Its better for you to be mature. But there is no age limit for making girl friend or boy friend. You have to make your future 1st. Enter this thing after your future.
Everybody got a chance, we cant stop the time. So be it in Uni when you found someone able to by your side. As long as he is honest, humble and handsome (ya 3H). I have seen couple started when they are 19. Get married have children now. Nothing wrong if you do as the book says.