H#LP????!!!!!!!!!!!!! friends trying to steal the guy i like! >:( ?

So this guy i no and I see eachother ALL the time. no were not dating or in a relationship we always just run into each other. I really like him because he is such a gentalmen and very charming not to mention hes extremely good looking and is single. now a close friend of mine has recently starting dating this guy and they are now a couple but she is constantly flirting with other guys. I ran into the one i like and shes askin me whats his name and stuff and i didnt give that much away, not to mentiuon shes a year yonger than me and im in the guys actual grade . Anyways my close friends brother is also the same age as me and nos this guy and gave her some details about him so now everytime we p eachother shes yelling from across the streett heyyy ________!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!… and keeps repeating his name over and over. Then later on fb she rite a status about how there are some way hotter guys should could get or something like that. Uggg it bugs me so much! she does this all the time, to everyone, everytime someone has a chance with a guy she steals them away and its happened many times before... she looks a lot older than she is and always overdose herself with makeup and a little bit suggestive cloths. im afraid shes either gunna make this guy think im a weirdo cuz she always calls his name and even scare him off or she'll dump her old boyfriend and try to win him over. what should i do :'(!!!!!!!