How to deal with workplace bullying?

Hey everyone;

I want someone to help me out with workplace bullying. I feel like all the women at my job are trying to get me quit. This happens every job I have. I always feel like Im being suubjected. Ive heard too girls at work say "She's so pretty, and she has a nice body I wanna punch her in the face". I always respect people and im nice, im not a rude person. Im kind and giving and happy. Now theres this girl at work thats telling everyone I have a bad personality, shes telling everybody that im mean. Im not mean! She tries to boss me around and tell me what to do. Im 22yrs old, im a college student and I go to work and study. I dont bother people. They say im too mature for my age. I dont understand, how my personality is hard to deal with. Im not loud or arrogant. How do I deal with this. I cant go to my manager because she has the same addittude towards me.