making my self sick to be skinny, help me

This is no way a cry for attention but I need help, I've started making my self sick after meals because I wanna be skinny. I never thought i was too fat, Just thought i had more junk in the trunk in certain places. I now have it in my head I'm fat and discusting.. I've been feeling this for so long now and I don't go out because of it, I cry all the time, I feel sad at the gym, at work . Today a guy that I recently met Up with asked me to meet him again and I said no and he said  ' you are a fat minging slut anyway' and I'm feeling even worse. I've been called fat before, I've tried to stop eating but I can't so I'm making my self sick to get it all back up. I wanna be happy with my self and I need someone or something to talk too? What can I do??? I don't wanna harm my self . I am the 3rd one , small and dark hair. I have a wide upper body and shoulder and big thighs ect ...