What's the relationship btw ROCD & limerence? (& other ?'s)

I recently self diagnosed with limerence. Is this the same as ROCD?

It will be a while before I can get into therapy and, in the past, therapists refused to discuss what I now believe is limerence. They sort of laughed it off because my LO of going on 10 years now is someone I only know through the internet. I dont think they understood how obsessed I am, because they refused to discuss it, really. Is there a way to broach the subject of an obsession with an internet person so that it will be taken seriously by a therapist?