I find them very irritating when not involved. It seems that ‘love’, perhaps not of the true variety but of the more common sort, tends to create patterns of behavior with the same status in social interaction as an inside joke. These create humor and a good mood between those involved, and a complete lack of interest, even disdain, in those who are not. I’m inclined to believe that this is always partly intentional. An inherent disharmony in the relationship or the people involved creates a need for some artificial connection, something to separate ‘them’ from ‘us’. When the deeper connection everyone seeks is felt on some level to be missing, the desire is to create it arbitrarily.
I believe that a deeper form of love doesn’t have this irritating effect on it’s surroundings; the things shared privately don’t require anything as pedestrian.