Why is my life so screwed right now???

My ex - friend Lexi has had two really hot boyfriends and she's ugly!!! She puts no effort into her appearance, and looks like a boy for god's sake!!! I on the other hand, spend forever trying to look pretty and I about ready to kill myself doing it because no one has asked me out yet!!!! All the boys think I'm ugly, even though my friend's say I'm beautiful! My dad doesn't even want me to date, and if he found out I wanted to, he would lock me in my room for who knows how long???? The boyfriends Lexi has had, she all claims have loved her and have kissed her!!! One of her boyfriends was the guy I really like and she knew that, but she asked him out anyway!! She kept texting me every time they made out or every time he told her he loves her and even put his name with a heart next to it as her signature!!! I told her not to, and how I feel about him, but she just ignored me and kept doing it!!! After she broke up with him, she still texts me and still thinks I'm her best friend and won't leave me alone!!! My friend's all keep a distance from me because of her, and she won't stop sending me pictures of Michael Jackson!!! She thinks he's my idol too, when really, I hate him!!! How do I get rid of her forever and get a date???? Oh, and one more thing, Lexi is a double D, and I'm still an A cup..... I'm beginning to wonder if my bra size is a contributing factor????