Why are woman at work on my case because i look after my body?

I'm just gone 20 yrs old. I'm female and i've just finished 1st yr of medical college. Life is good to me and i appreciate it all. I have been blessed with looks and model part time. Dont get me wrong, i realise looks are a fleeting fortune but for now i am going to take care of myself and hopefully stay modelling part time. I have been several times mistaken for Megan Fox ( all my sisters have black hair aswell and look like her!!). I'm very strict with myself. I never eat junk, i do not drink alcohol, i do not smoke. Sport is what i get my kicks from. I jog one hour per week and i do rowing, so i make sure my body is in top condition. I work in my dads finance company for the summer. I realise i'm very fortunate. I have my own apartment and sports car and dad gives me an allowance which is bigger than alot of people's salaries..because hes worked hard and likes to take care of us. I get hit on alot. A 34 yr old man in dads office has been actually annoying me. A 35yr old woman is crazy about him but he doesnt fancy her. We were all out for drinks two evenings ago and he wouldnt leave me alone and almost pawed me. She was there in a skimpy skirt and shirt, got drunk, puked in the bar and tried to have him. Her friends then gave me evils even though i've been hared by the pig. Another girls boyfriend also hit on me, and kept calling me megan all evening. I wore very y hotpants and killer louboutin heels and a y top...why shouldnt I? I'm a 20 yr old girl, and i work hard for my body, i make sacrifices to help nature. Now, one of the girls at work who is a size UK 22 took me to one side and told me 'to tone it down' when i'm out at work and wear some clothes!! I feel i am being bullied and one word to my dad would make their lives a misery and next step would be out the door. What can i do