Guys or girls I need help or I am going to die?

I loved my bf we went out for 15 days this girl named xxxxxx was telling malan I am a ***** and malan just told her she's not your a ***** for calling my gf a *****!!! Then today he didn't even tell me he had his best friend xxxx do it for him well his friend told me he was breaking up with me. And I was like uuuuuhhhhmmmm ok.!??? So in the middle of cl I start crying!!! And xxxxx my ex saw me and yea why would he do that to me.???? PS me and my ex are emo soo yea I cut myself 4 times I love him