Of all the zodiac signs, Aquarians are the most likely to marry later in life and be single for longer periods of time. At least this is what you read in a lot of the astrology books. And just from my own personal observations, I've found it to be true that Aquarians tend to marry later than most other signs.
This is usually attributed to the ruler of Aquarius, Uranus. Uranus is freedom-loving, and can often be erratic and even eccentric. Aquarians are less afraid of snubbing convention and more at home with their independence than the typcial person would be.
Aquarius is heavily emphasized in my chart and I didn't marry until I was 38. Not only is Uranus the ruler of all my planets placed in Aquarius, but it also squares my weak Scorpio moon. I suffered a lot in thinking I would never find my mate and always be single. I was not often at a loss for boyfriends, but the 'fated husband' was a long-time in coming. I'm so very thankful I waited in retrospect, and only wish I could have enjoyed my single years more, and that I had had the relaxed faith that I would eventually find my life partner.
Someone recently pointed me to a neat website. The title is "I can't believe I'm still single". The author is a successful New York movie maker who turned 44 this year. And guess what sign he is?
This guy is extremely Aquarian. He has a stellium in Aquarius including Sun, Mercury, Venus, Jupiter and Saturn. His Sun/Saturn/Venus are locked together within one degree. And though we don't know what time he was born, it's quite likely that his very powerful Uranus (conjunct Regulus), the ruler of all these planets is also not so gently suffocating his Moon in late Leo. He was born January 22, 1962. He probably knows nothing about astrology, but he might want sit up and take notice; maybe even read some stuff on Moon/Uranus conjunctions and Aquarians in general.
In any case, his new site is a representative case study of the single Aquarian ;-).