How do i get people to stop saying i'm anorexic?

I'm sick of people calling me anorexic I'm 20 years old , 5 foot 2 and 105 pounds. I eat a ridiculously large amount of food on a daily basis but no matter what I do I can't put on wait I never have been able to. I tried weight gain supplements,drinks etc. nothing works. My dad is tiny like me too so i think it's hereditary and doctors tell me I'm at a healthy weight , but i still always have people tell me I'm too skinny or anorexic, even bulimic. It's rude and I can't believe they have the nerve to say it to me but i'm usually to hurt to say anything back to them.I recently started feeling suicidal because i'm so unhappy with the way i look i used to be fine, even happy with my appearance but i think the things people say to me are getting to my heart and head.I even try not to hang out with friends at places where you eat because someone always ends up telling me I need to eat because i'm anorexic or too skinny...its getting that bad that i can't socialize. Please give me advice on how to get people to stop saying these things to me, how to look like i put on weight , comebacks for when they say these rude things, or just how to not take it personal when they do say it.ANY advice is welcome. please and thank you