
First off: English is not my first language so I’m sorry if I make any mistakes

 My boyfriend and I have been together for one and a half year and he knows that I have bpd/eupd. And from the beginning of our relationship he had a best friend/friend that I just couldn’t like. She said stuff to me that I took personally (which is why I don’t like her). And every time  they text eachother or he just tells me something that includes her I just cry and get mad at him. I hate that I am the way I am. Every time I see that she texted him or anything like that we are having a fight and it ends with me just crying on the bathroom floor. 
Can someone please tell me how I can stop because I feel like the worst person.