My [29M] GF [30F] drunkenly told me after almost 2 years of relationship that she slept twice with her best friends [30F] current BF [30M] ~10 years ago.

Have you not read all of the comments in this post? It's not the fact that she slept with this guy 10 years ago, it's that they've all been hanging out together for two years and not once did she give her BF a heads up about her past sexual relationship with this other guy. Because she kept this from him, now the BF gets to have a great time of possibly reinterpreting the interactions between his GF and this other guy, as well as the possible private jokes between his GF, her best friend, and the other guy. OP's BF should not place blame on her sleeping with this other guy 10 years ago, however, he should place blame on her for lying by omission.

/r/relationships Thread Parent