I’d add that just because your boyfriend has sexual conversations with other women it doesn’t mean it’s ok or that you should do the same. Sexual teasing isn’t the same as having friends. Your boyfriend flirts with other women and now you flirt (or let him flirt with you) with other man. That’s not friendship. Do you flirt and sexually tease other females? Does your boyfriend acts this way with men? If not, whatever is happening isn’t friendship.