I think a big part of loneliness is recognition, and it is definitely possible to be loved and not be recognized. There are many more layers, or facets rather, but I think at its core the feeling of connection is a yearning for variance. I can be loved, but maybe my loneliness subsides the most when I'm playing music with my band mates. The action of being loved here is irrelevant, my partner can give me all the love in the world and I'd still yearn to be playing music as part of something.
Part of the struggle of loneliness also comes from sometimes not knowing what exactly that is for the individual, or if there is something that staves it off but does not actually relieve the feeling (I could see online communities and gaming being in this camp.)
Great read, thank you for sharing.