Dear PeaceHawk,
I am a gay male with many straight friends. I myself, try to be respectful. However, I do know gay males that like to “be-edgy” I doubt anyone could promise you anything. Th.e direct approach may be best. Let your boyfriend know you don’t feel threatened. Things would be more comfortable if actions changed ask him to speak with his friend about always including you or making it so that you would be included directly after. Or ask if you may speak to him. Impress that you are not trying to end a friendship, simply become more part of a circle.