How Does A Virgin Look Alot Of Boys Tell Me I Don't Look Like A Virgin-What Does This Mean?

Alot of boys tell me I don't look like a virgin-What does this mean? - how does a virgin look

OK, I'm 13 and recently in the school a lot of guys told me not see myself as a virgin and I do not understand it! I am! I mean, I have not even done with anyone before! I'm not wide at the hips or something that I noticed that you have curves, but I'm thin. Why are they there? I am outraged!