Questioned about age

I know I look younger than my age ( I’m 23 this year) I am on some online dating sites and it’s been getting annoying how often people are asking me if I’m my age on profile / how old I am ( when it tells on my profile). It’s like maybe that’s why no one ever flirts / asks me out in person because I look underage... so annoying I try to dress/ look my age but something about me looks young and gives off sweet/ innocent (people I barely know apologize for swearing around me, I rarely swear but I don’t mind when others do) which I can be but I’m definitely not near as innocent/ child like as people think I am.