Two girls and a boy
It is the difficult situation when a man meets a woman he falls in love with and than he realize that there is some kind of a friend of opposite sex. Though, the situation is twice difficult when talking about girl who finds out that her boyfriend has a female friend. It is the war of worlds and a few people will survive in this war.
As a rule girls never reveal their anger but they are always angry about female friend of their boyfriend, and they actually have a reason for it. The same true for female friend, she also feels jealous as he had her friend who was only hers and here some woman appears who is taking him away. It is not like a friendship or love; it is more like it-is-mine feeling.
The wounded one in this war will be a man who will for sure try to make those two friends, though they will never be friends, thy can only pretend it. What is worse, neither of those two will say what she really feels, they will smile each other and say a man that they are okay with situation and that they don't mind about female friend or something.
Though indeed, both those will be gripped with fire of war and they can cause a good number of wounds to each other and a man they fight for. It is also common that female friend has no feelings about a man and she is a friend indeed, though his girlfriend is mad about such a friendship. In this case it is better for friend to leave them alone.