Anyone can be lonely at any time, even surrounded by people who love them.
I’m happily married, I love my wife very much, she is my favorite person and I would be devastated and lost without her. Still, sometimes I feel lonely.
Sometimes I think about my dad who isn’t with us any longer and I feel lonely. Sometimes I think about work stress and I feel lonely. Sometimes I feel lonely for no damn reason at all.
None of that has anything to do with how much I love my wife, or her ability to “provide”; people are just complicated.
https://yourlogicalfallacyis.com/the-fallacy-fallacy