Purity

Hello, my name is Kalaya or Laya for short. So i wanted to talk about purity. I am now 15 years old 16 in August, and every year since i was 13/12 i dont really remember i have been taking this purity pledge and basically what that is im saving myself for marriage. Stated otherwise im staying a virgin till im married. I know most people don't believe it's possible and even when i tell my friends or family they arent supportive with my decision at all. They dont believe i can do it considering my age and temptations and sometimes i even doubts myself because of what everyone is saying. My question is am i doing the right thing this is what i want more than anything but so many people are doubting me what should i do?