Is it ok to be a virgin?

ok im a sopre n im still a v. i use to tink most girls wanted to be virgins but i think differently now. My top 5 bffs n me promised each other not to do it b4 we got married n 4 of them have done it already!!! most of d ppl in my school have 2. am i d only one dat tinks its best if you do if once you get married? i still kinda tink its gross like if i was immature or sumtin (dats wat ibe been told) but im not. i consider myself mature, i just dont want to have right now.