am i sex addicted

im 17 years old and have had 8 sexual partners and had sex around 20 times, im currently shagging a guy who is 3 years older who my best mate reli likes and the guy im shagging loves her but she wont put out. i know myself that the sexual partners ive had are sex and nothign else, that dosent bother me as i love sex and feel i am addicted to sex is this bad ? am i a nimfomaniac sometiems i cant go a week with out sex and sometimes have it twice in a day