She needs mental relationship, companionship, and above all, friendship with a man: someone she can talk to all night and all day, who will stand by her, be loyal and genuine and caring about humanity as well as about the individual long before she'll even consider him as a possible mate in bed or in the home. Aquarian women often live alone better than with a partner and spend a good deal of their lives independently succeeding in careers rather than in motherhood.
Her emotional detachment keeps her free from forming too intense and personal relationships. It gives her an open lifestyle, the chance to encounter as many friends as she possibly can. If you can be her friend and not attempt to own her or try to change her and accept that you have to share her with the world as she shares you with the world, then you may have found a soul-mate. Her apparent lack of passion can be frustrating, but her loyalty is impeccable and her stability is supportive.
She enjoys sex and physical contact as a pleasurable and warm activity between friends, but she won't ever let you get soppy or slushy. If you do she'll think you're weak and pathetic and she needs a tower of strength in her bed, not a fragile sandcastle. She can take sex or leave it.
The essence of an Aquarian girl's love is based on her need to force herself to be different, to be an eccentric. She will, of course, have delved into your mind, wriggled out your intentions, and scanned you with an emotional barium meal to check out if you're worthy of closer inspection. But if friendship isn't in your heart, then love and sex won't be in hers.