One can mask their primal instincts for a while, but eventually they will boil over. Walk away from one of them, preferably the boyfriend, because the damage has already been done. If a man is OK with his woman seeing other men then he doesn't really give a shit about her. The Harem mentality is natural for women, that is the way it evolved. Men have never thrived in harems so you are fighting the laws of nature. Primal feelings ruled by your reptilian brain will eventually surface and it will get ugly.
Originally Posted by FlectiNonFrangi
The colors now match the message.
One of my favorite book titles: If You See a Guru in the Middle of the Road, Run Him Over.
Translation: People that insist they know what you should do should be avoided at all costs. Life has no roadmap.
Good luck to you, OP.