But if friendly meeting pleasant, if a mutual devotion and interest in each other are not exhausted, if the communication gives warmth, comfort, then, perhaps, such a relationship can turn into a real strong female friendship. And not to destroy it, you should always behave in the bounds of decency, and to comply with certain ethical boundaries.
Rule 1: Trust, but not blindly.
Try not to throw out at her friend all my thoughts, observations and suspicions. The most intimate and secret still leave with him. Taboo on a number of topics to discuss with a friend who is not welcome.
Rule 2. Personal life - especially his own business each.
Free advice, guidance, teaching appropriate only if you are asked. But even psychologists are accessed for guidance, never give direct advice and action plan. Your task - to listen, support, perhaps slightly forward, but not to interfere and not control.
Rule 3 does not change the cavalry.
Fans boyfriend and girlfriend - a taboo. Those boundaries should respect and your "Sisters in Spirit": your gentlemen - it's just your gentlemen. If this rule is violated, obviously female friendship will end.
Finally, how strong no matter attachment to a woman, it should not overstep the bounds of personal space. Do not lead to the absurd friendship, inviting girlfriend untimely live at home, sharing with her wardrobe, a plate, a sofa, a sense of one man, etc. And most importantly - trust your instincts more than a close friend in time to recognize the hypocritical "sincerity" girlfriend.