Hello, guys.

First just want to start off by saying I don't demonize those with BPD. My mother has it. I potentially have it. And my girlfriend has it. 

Is cheating a common occurrence when you are devaluing your significant other? 

We fight often and things get very intense. Recently, a plethora of lies have been revealed to me when it comes to my girlfriend and other guys after my coworker told me she cheated on me with another coworker. The times she was with other guys were all immediately after major fights. She still insists she did not cheat on me. But her plethora of lies coupled with her diagnosis of sex addiction alongside her BPD diagnosis have me doubting the truth of her claims. 