How skinny is too skinny?

i'm really confused. people have started to say to me im too thin. parents have discreetly asked me if im loosing weight, which i have denied, but is true. 5ft 3, 103 pounds. and to be honest i do not want to put on weight, if i do i know i'll make myself lose more by eating less. im 14, and im basically wondering if i look too skinny. when i see people like that it looks horrible. you can see like five of my bottom ribs, hips, spine, collar bones. eugh.. writing that makes me feel .. ew. but i don't want to put on weight. i feel 110pounds is too much.