Astrology: Do opposites really attract?

Look at the celebs: Brad and Angelina, Nicole and Benji, Avril & singer of Sum41, Nick Cannon and Mariah Carey, Christina Aguilera and her producer husband, real life couple Jules and Shawn from tv show Psych,.. In zodiac/astrology, your opposite is 6 months away from your birthday month: Sagittarius-Gemini, Cancer-Capricorn, Libra-Aries, Pisces-Virgo, Leo-Aquarius, Scorpio-Taurus. My grandma was happily married to her opposite. my mother, (Taurus) divorced my father (libra) and then married her opposite (Scorpio)..
I also see this trend within my friends. yes, I observe that everyone argues.. but in the end theyre truly best friends.
I feel like, out of everyone I know, I am the only one who is a believer in this. I’ve never talked about or mentioned this to anybody because they might thing I’m crazy or something. but I wanna know.. Are you a believer? Can this potentially be true love? Who do you know are opposite signs? Success or fail and why?