selfishness and jealousy, a friend in need... Options

[inn0centmarianne]

of help, okay, well i have this friend, shes a few months younger than me, and shes been in "love" with this so called guy, lets call him "c" and ever since 6th grade, she has liked him, he liked her for a short period of time, but got over her, he broke her heart. now my friend met all these other guys, "J"& "a" and now theres a "k" shes currently cheating on "a" with "k" and its pissing me off, shes hurting all these guys, plus, now one of our close friends "kris" likes "c" and "c" likes "kris" back, my friend finds out and trips about this, shes jealous, and being selfish, she wants THREE guys at the same time, how the heck do I help her? I dont want her to be hurt, but she has to learn her lesson, i mean, what if ALL of these guys find out what shes up to, and she ends up with NO ONE, ugh, help me please?