In my honest opinion the MOST personal and sacred thing a girl has is her virginity, until the person who you will to spend your whole life with comes along.
It has many reasons to be so to:
It is an organ where by the most important joy of life comes from. Some temporary but More importantly life long love of bearing children. So it is very important that the one who you feel is important enough in your life that you would bear children with, who will be there until death, should be the only one with access to it.
The moment you lose your virginity to that person, a connection of trust is formed, of his care towards your pain and emotions, an understanding and a tie that is formed when he understands that you entrusted him with the most precious and important thing in your life that you have been protecting. You are happy to create the most precious of things to a mother with him.
remaining a virgin will be worth it when you realise this connection.
And for those who say it is a matter of the past; this is one of the main reasons why marriages do not last in this day and age. And they only care about temporary use, like a disposable tool, you should think to yourself "are you a disposable thing."
They will be many people who will disagree with me, but I assure you those are people who have already made the mistake and cant take it back or are the guys who like disposing things.
(this is the importance of virginity in my opinion)