More numbly confused for me, but I hear of this a lot.
I don't have any friends to be jealous of, but it's hard watching people enjoy themselves during the darker moments. There's a distinct feeling of being from another world and of looking at something I can never have, like when I was a little kid who'd play at friends' houses near the holidays and then get out of their way for their Christmas dinner to go back to my dysfunctional family. Sometimes when it was just a private thing for their family and not a holiday (like relatives visiting), it was hard to leave in the evenings knowing I'd go back to parents who either would be buried in their work or absent entirely while they all sat around the table and laughed. They were generous about letting me spend a lot of time with them, but it was kind of an unspoken agreement that I wasn't actually part of the family or invited to those things.
It's so easy for some people. They're literally born into good families, and if they follow cliche advice they get results. I work off common interests, give others space to talk, and invite people out and... they avoid me. My entire life has been self-improvement, and I still don't have what they just reached out and grabbed out of the world. The family is only just beginning to come together again, and there's not a single person I could call for lunch who isn't related to me.