looking like a child

i’m hoping this doesn’t get taken down i just want to share something that really hurt im 18 and i went on a cruise a while ago and a girl i met on the cruise out of the blue goes “i think everyone that dates you is a p3do because you look like a child”. i think about what she said so often now whenever im intimate with someone im like omg are they into kids or what if they’re turned off by me because they think i look like a kid. i was also talking to a girl who told a friend that i looked like a child a year before we got together and then we got together and it was just so odd to me like do you think i look like a child cause that’s weird if you’re doing all this with me. anyways i get told stuff like that very very often and it really bothers me. any advice?