Overindulged in alcohol possible alcholic?

im a 21 year old women and frankly one of my best friend thinks i'm an alcoholic. Here are the facts i drink not even once a month but when i drink it's hard to stop myself from getting completely wasted mostly because i feel like if i drink i wont feel completely out of place.(alcholism runs in my family) My question is a two part question am i an alcoholic and what do i do from last night because i acted completely idiotic in front of my coworkers. On saturday i went to a halloween frat party and at first i felt a bit uncomfortable because i did not know a lot of people and the people i went with were my coworkers so my intention was to drink very little because i act extremely flirtatious and i did not want to mess around with some random guy again or worst a coworker. well i drank a Little and then out loud i said im done for the night. but one coworker convinced me to drink more basically the night was me making out with a bunch of men not all attractive saying no alot to and telling my male coworker that i would fu(k him if he wasnt my coworker im so appauld and tierd of being a drunken and its funny because im kind of a prude sober. i don't know how to face my coworkers tomorrow. help me