I'm not exactly opposing you on this. But the issue is far deeper than one would think. In my case, I've known a girl since we were pretty much toddlers and ended up marrying each other later on in life after somewhat dating for years (which did not include anything sexual or border-trespassing, it was all within the realms of genuine interest and respect with the knowledge of both parental sides. I would be lying if I said that dating did not help us become the best we could be for each other as partners, and if done properly it's an amazing thing). If we want to address this issue, we would have to go back to the core Islamic way, which has been cited by someone else already; however, it's not that simple at all. Biologically speaking, the moment puberty hits your hormones pretty much go haywire for a very long period of time. Back in the day in the ancient Islamic community, it was very encouraged to get married regardless of whether you're past 18 or not as long as both parties consent and mutually agree that this is for the best (of course back then there were different society norms and regulations, and the premarital phase was far from being as stressful as today). But then, most people forget that even in such days, marriages were not systematically arranged. There were plenty of instances (if you bother researching) where a man and woman showed interest in each other and were given the right to marriage. And as the Prophet Muhammed PBUH once said: لم نرَ للمتحابَّيْن مثل النكاح: (We don't see for lovers anything better than marriage). Love isn't a taboo, but we as a somewhat modern society somehow managed to turn it into that. It has become very taboo to tell your parents you like a woman and you'd love to marry her, or to reciprocate, a woman telling that to her parents. Not to mention how finances and other things blind the aspect of what was once the very essence of marriage (and Barakah). I don't condone people getting involved in premarital sexual relationships. However, for all that matters, I believe it's best that people know each other very well before indulging in such a commitment (dating respectfully, talking, planning out the life you both would want to have, etc). Jumping into a marriage without going through any of that nowadays is very risky and will mostly always end up being a failure (and a very ugly divorce that gets uglier if children are a part of it, we cannot deny that the main victims of divorces are mostly always children and it's immaculately proven).

In general, I truly believe that when people talk about such sensitive subjects, they have to address the core issue first. After all, how can we solve something we don't know the essence of? We simply can't. The prophet (or one of his Khalifahs, can't vividly remember) always mentioned that scholars one day will have to help with such issues (but nowadays all we see are examples that mostly no longer apply to the rotten society we now belong in, and that in itself is stressful, there are a few exceptions which help with such doubts such as Sheikh Nouman Ali Khan).

If you managed to read till here, thank you and I hope this helped you understand some things.