Is something wrong with me?

I'm sixteen years old, and I have been with my boyfriend for about 2 ish years now. Yet I don't want to have sex. I know it sounds weird. I just can't help but think something is wrong with me. All of my friends have either had sex or are planning on it. Yet with me I couldn't even imagine it. It's like all my friends are growing up and I am just not. I get judged for it too. My friends will tell me that my boyfriend is going to leave simply because I won't have sex with him. Should I feel dumb because I won't just do it? I don't want him to leave, but I literally have zero drive to do anything like that.