I've never had one so my oppinion is technically invalid :P But I'm guessing its just a case you can't help who you fall in love with? I mean i've met people online who i've loved but only in a friendly way, But Online relationships just seem hard to me, I Like to be hugged and known im needed. (I am Actually a boy :P)
Me and My Girlfriend now have been dating for like 8 months and shes so special to me, I don't think i could take it, If we couldn't see each other often or just hold each others hands or even smile at eachother properly, Thats the only reason im against Online Relationships, Well that and the Paedophillia and Rape sides.