i feel so unloved...

My best friend recently started hanging out with this guy from our school. I thought he was kind of cute so I started talking to him too. I got to know him really well in the few days we had started talking. He told me he thought that I was pretty and stuff so I took it as a sign that he liked me. Well, my best friend said that she liked him, but she is dating someone else. She asked me to help her break up with her boyfriend now so she could go out with him. I got really mad because I told her that I liked him and she said she didn't care because he never would like me anyways. She also said that I needed to get more friends because I have none and to get a life. (Btw, this is all over text) And then she ended the long text with "Bye b****. Have a great f***ing life, which you won't." Once again, this was my best friend... I don't know what to do anymore. I feel like I don't have any friends and I feel like im really ugly. Any advice?