Am I too innocent for my age?

Firstly, I’m 22 years old. I have always prefered to dress modestly because it’s the only way I feel comfortable, and I usually wear long vintage dresses. Because I look younger than I am, and have fair skin and long blonde hair, people have told me that I look innocent and angel like. I think it might be because ever since I was 14 I’ve been guarded from the outside world because certain things happened to me which destroyed a big part of my life, and now I have an intense and constant fear of people. Due to a mental disorder. This makes it impossible for me to meet people or have friends. Nature is one of the few things that makes me happy, or being in any kind of beautiful surroundings, it makes me feel like dancing and admiring the art and beauty of everything around me. I’ve never had a boyfriend. I don’t swear. Sometimes I feel like I don’t belong in this world and that nobody will accept me for who I am. My sister makes fun of my innocence because I don’t understand her sexual dirty jokes, and I don’t like to laugh along because it’s something I personally don’t approve of. As for myself, well it seems like people don’t like the way I am and think it’s old fashioned or odd. Since when did innocence become something that is looked down upon in our society?