Yeah valid question that would involve explaining just how insane my relationship with her has been. Long story short, we were not exactly living together when she accepted his friend request and I can't exactly comprehend why she would do so. Our relationship was exceptionally turbulent last year and we only have been back together about 3 months after about a 7-4 month break. So we were living separate but not seeing anyone else for a few months then we both dated a bit then we ended up getting back together. Long story short: It's complicated.
*awaits chants from the masses of "dump that crazy bitch" and "wtf are you thinking."*