Singer carefully crafted the reason for his return, "the world is crying out for a savior." If you start to muddle that succinct message up with more than just implied romance, then the plot gets too convoluted. Hence, when the comic books involved characters other than Superguy woven too deeply into the plot, they lost interest in droves. Saviors don't get married... they stay clean and pure, lonely figures, whose lapse of celibacy is tainted only with rumor.