Lostforever, I feel for you. I am in a similar situation where my W is possibly gone into a gay relationship or a serious EA with the female friend. But in saying that, it has to be taken the same way as any other normal (not that they are normal) affair. Just because the OM is the same sex, doesn't change the way we deal with the sitch or handle the sitch. Follow the DB principles, yes it is bloody hard, yes it feels like a big hole has swallowed us up, but the reality is we will survive this. Your choice is how well you survive it.
ME:51 W:46 M:25 S:22, S:20 Divorced 16/9/15 BD 10/12 W left 12/12 with OW, affair confirmed Nov/12. Dark since 6/13 I"m in a new relationship since Feb 14.