Friend troubles?

ok my best friend is just starting to date this kid and were what u call emo so really hate this kid and she like thinks she loves him and im trying to warn her but she got all pissy and the boys 11 and shes 13 almost 14 and he self mutational him self and he online dates and he get horny when he ******* sees me and im biual and i like her she knows it to but she said get the **** out of my **** man just **** off and then she singed off then i started to cry cause i really like he and **** but shes totally ignoring me and i cant deal with it like literally im under depression and that could lead to things but shes also on her ******* period but she tends to get angry fast. but she gets over things fast do you think shell get over it??