Personally, not that I have much experience in this venue, I believe that both parties should be mature enough to think realistically. Look at all of the secular teens out there – do they end up getting married to the boys they dated at age 16 or 17? Let’s face it, the truth is, most teens and young adults are not as mature as we’d like to delude ourselves.
Not only that, I would wait until one has both completed their education and found a means of parnassah to support the family they are looking to start.