Thanks for your interesting topic!
Well first I want to point out that, before I was saved I certainly had my fair share of lovers. But, God changed my heart and I was made a new person. The past is forgotten and I was reborn.
I was saved by His grace nearly 3 years ago, and sexual sins and desires are certainly things I struggled with. As I was going through the scriptures, I found no evidence that "long term dating" was biblical, in fact it states that it is better to marry then to give in to sexual sins. So within 4 months of being saved, I was married. My husband and I courted for 3 months, only seeing each other with chaperone's and leaving even our first kiss for our wedding day. Because of how quickly we married, certainly the critics will find that, we didn't have time to properly getting to know each other, and it certainly caused a certain amount of challenges especially in the beginning. But the Bible says nothing about "getting to know each other", my husband and I honor God by loving, and caring for each other. For taking on our God-given roles. My husband is my leader and I fully submit to His authority. We center everything we do, every decision we make around God, and despite the fact that my husband and I appear to have nothing in common, none of that matters because God has blessed our marriage tremendously through our obedience in Him.
All of that to say, I believe that in order to keep yourself pure, it is imperative to find a spouse quickly. God says nothing about dating x amount of people, for x amount of time. The reason it says nothing about it, I think, is because the more you date, the longer you wait, the more likely it is that you will fall into sin. Now certainly some will not be called to marry, and through the obedience to God they will overcome those impure thoughts. But for those whom God has called to be married, I pray that they might find that person young and that they might glorify God through their marriage.