I hear you on the loneliness. My wife and I are in a poly setup and she has a boyfriend. They've been spending a lot of time together, and I'm really happy for her. And I don't feel neglected by her. But I do get this sense of loneliness, yet I also find myself having trouble getting out to meet people.
"Stories are the only enchantment possible,
for when we begin to see our suffering as a story,
we are saved."
— Anaïs Nin