What an insensitive bitch... Wether they're doing something perverted or not is up to them, you can't tell them otherwise, and coming with them in a date, what a shameful act to do... It's like your ex come crashing everything on your wedding day.
Besides, You have all the time in the world being his "childhood" friend to confess and now that he got a girlfriend already you should've just back the fuck off.
She got Good communication skills they say, yeah right... Better shut up next time if you're that insensitive, it's a waste of skills.