I have this theory about my girlfriend that her best friend is in love with her. They live together, and I knew the two of them were close before we met. When I was there her friend would go into these bad moods when the three of us were together, usually started when just the 2 of us would share a private joke. there was definitely a bad vibe between me and her, and at first I couldn't fathom what I might have done to make her dislike me. On the last night there the three of us went out with her cousin who had originally introduced us, and he kept joking about me and my gf spending the last night together and promising not to tell her mum. Every time he mentioned it I glanced at her best friend and you could almost see her heart breaking. In the end she just stormed out the place. There were quite a few instances which gave me reason to think she has strong feelings for my gf.
Not sure how to handle it. Should I say something to my girlfriend or just let it ride its course?
And please, no menage a trois jokes ok
