My boyfriend and his bm have a best friend sort of relationship. It makes me very uncomfortable but everyone tells me I’m being selfish and I should be happy that everyone is getting along. I saw them together for the first time this weekend and from my point of view they were flirting. It’s hard enough they have this bond since they have a child together. I’m not sure where I fit into all of this. He assured me he doesn’t look st her romantically and they’re just good friends for the child. Am I being selfish ?