Why do all these people keep calling me a whore?

ok so ive heard from ALOT of people that these other people think im a whore, i mean i have a weird way of flirting with guys if i like them i cant look them in the eyes and im quiet, but i guess when im with a guy i dont like im bubbly and outgoing and they take that as flirting. but so i think im pretty but im not the type to go around screaming it but i do give off a vibe that i have self confidence which i think is good. but idk why do they keep calling me a whore when i got my firs kiss like five monthys ago when im 14 and hardly ever date guys wtf am i doing that makes me whore? haha please help thanks (: