I am 20F and Someone told me that I look older than my age😭

One guy messaged me on reddit and we messaged a bit later he asked my pic i said him that I will share him my insta id .. and i shared him .... By looking at my pic he asked me whether i am married cause I had wore kumkum....later he was like that profile wali girl doesn't seems like 20 ... She is much older... And he told me to share my real insta id.... 😭😭I never knew that I am older than my age.... Now I am insecure about my looks😭😭