Many people use the term "involuntary celibacy" to describe datelessness.
The Love-shy term does not cover all people perfectly; some have had relationships in the past, while others have no problem approaching, they just can't get anyone to say "yes." Other terms for describing the predicament exist.
Many also suffer from things like Asperger's syndrome, and so may not pick up on cues that a potential partner is interested in them.
This often gets misinterpreted as homosexuality or asexuality, when in fact the love-shy is dying for a relationship, but just doesn't know how to express it.
Love-shyness as a concept is fairly easy to explain, but questions are often evoked about its scope and exactly how it affects individuals. He chose the term to describe people who are shy, but want romantic relationships, and just can't get them no matter how hard they try.
Listed here are answers to the most frequent questions; more detailed answers can be found by registering on the forum and asking the members. There is a large umbrella of interpretation possible and love-shyness is certainly a spectrum of disorders -- no two love-shys are alike, and many do not fall under Gilmartin's categorizations, but they are still love-shy.
Most love-shys support things like gay marriage but the tone of the forum is decidedly hetero. The argument that not as many women are as effected by it as men seems to be true, coroborrated by the much higher incidence of Asperger's syndrome in men, but that doesn't make the suffering of women who are love-shy any different.