What an awful situation to be caught up in. Does seem as if you are a bit low at the moment. Perhaps a visit to the docs? Have you thought of mediation with the g/friend? If it is something that you suggest, especially in front of family, they will know that you want to resolve the problem rather than let it fester.
Hope that all resolves very soon. :GroupHug:
From a parents point of view.......A couple of months ago, my 2 eldest had a row to end all rows. It was really dreadful. I really didn't know what to say or do. So did the worst thing possible and said/did nothing. A few weeks later though I had to talk to them seperately to clear the air as they both thought I should have backed them up. It was the most terrible thing to be caught in the middle. But I was wrong in doing nothing as that only made things worse.