how to deal with boyfriend issues please help?

[Aisha]

yeah me and my bf we re together since 10 months and im muslim he`s hindu...so he converted into a muslim for me...One day i`ve got a fight with him..we were chatting on facebook ...then one of his cousin`s girlfriend ..asked me why were we fighting..i told her the reason ...but she did not listen to all what i`ve said and she started to call me short minded...i`ve removed her from my friend list and then she and her boyfriend are saying that im manipulating my boyfriend .WTF..they are planning to make me and my bf break up!!! i really want to kick that bitch`s ass...really first of all its none of her business..shes making as if its her problem ...what should i do?