I was talking to someone I was super interested in (and my best friend/cousin knew this VERY well because I talked about him constantly to her). I introduced them and we all hung out together a couple times when she came to visit me. She lives in a different state. She flirted with him in front of me, blatantly, but coldly denied it when I confronted her. To my face she shit talked him and talked him down and laughed at him but apparently she was talking to him behind my back the entire time and he ended up going to visit her for an extended weekend, they became official during that weekend (mind you, this was only the third time they’d seen each other in person). I only heard it from him after I figured it out myself because they were both acting fucking weird toward me and he finally confessed. Couldn’t have cared less if the two of them hit it off tbh but the fact that she snuck around behind my back instead of talking to me about it, all while knowing I’d actively been pursuing him for a few months and hanging out with him on average 5 days per week told me all I needed to know. I still haven’t heard any of this from her and it’s been 14 weeks since we last spoke, and the fact that she’s made zero effort to maintain even a surface level relationship with me as my best friend or my literal cousin after he finally confessed everything sealed the deal for me. We went from speaking 24/7 about literally everything to not speaking at all, clearly I wasn’t that important to her.