Now that I can see your chart....
A case can be made that you actually have a twelfth house sun in your original natal chart, and in any relocation that keeps approximately the same house cusps. It's in the twelfth house whole sign, and it's within 5 degrees of the twelfth house cusp in equal house (not sure where it would fall in a quadrant system, but possibly about as close).
Personally, I would interpret it with a combination of eleventh and twelfth house, looking especially at where their meanings overlap. Both houses deal with the long term, the legacy you leave, your place in the collective, who and what helps you become who you are.
The "friends and groups" meaning of the eleventh house is actually a very big picture meaning. Much bigger than just a friend group, much bigger than your social life. It was named House of Friends with a more archaic meaning of "friends" in mind: friends being who you associate with, who you share common goals with. Sometimes these people are also your personal friends, but not always.
Since the twelfth house deals with hidden enemies, and some say with black magic as well, we might be looking at a tendency to have frenemies. That would feel very lonely. Or even a tendency to get into situations where people turn on you. Maybe even someone working black magic on you (although it's much easier, and just as effective, to make someone think they're cursed than to actually do it. The important detail here is that you believe you got cursed.)
The twelfth house is also about your own deeply unconscious impulses, and about the exile experience - being a foreigner. I wouldn't be surprised if some of your social problems have to do with either your own actions alienating people (probably completely unintentionally), or perhaps, if you're living in a culture foreign to your own, committing some social faux pas that you have no idea of. It sounds like this woman you lived with was also from a foreign culture, not yours and not the local culture either - maybe you had a clash of cultural assumptions there, creating the problems you had with her.
Those are also Jupiterian issues. You wondered why your Jupiter line wasn't showing up - well, I think it is, here. Jupiter also rules the liver in medical astrology.
With that kind of sun placement, it's no surprise that you struggle with friendship. It's not a set up to make friendship all sunshine and roses and ease for you. It's a set up to make friendship, and community, something that you really have to work through issues with. The payoff, in the end, is that if you do that work, you can become very central to your community, whatever it is, wherever it is, and feel it working well for you.
A friend and mentor of mine has that same sun placement - Leo, eleventh house but twelfth whole sign, with Virgo rising - and she is a community creator, very well respected and liked in the community she has co- created. But she's also shared some stories of earlier struggles. Some of her work has been very conscious efforts to create a kind of community without the abuses she's seen in similar spaces.