Our friendship is over. We were close for over 10 years, until my friend took up with a very mentally unwell person. This person, after months of trying to befriend me, began stalking me, and then hating me when I disengaged. One of my parents was dying and I couldn't deal with making a new friend. My other parent is mentally ill. I tried to look beyond it (I'm not the type of person to be offended if a person with a diagnosed mental illness hates me; they're sick and I know that). But I had to tell my friend I couldn't befriend their new partner. I am not a bad person. I just had NO idea how to build any kind of relationship with someone so ill. And now? I don't want to. I have cordial relationships with all of my friends' partners, and am close to some of them I've known for decades, but I could not handle making this new friend, just because it made MY friend feel better...Now my friend has completely turned against me. I put up with my friends rude comments, putdowns, I was honest but polite about my limitations, so they cut me off. I tried calling, texting, emailing...it's done. I don't know...I'm not young and have had other friendships peter out over the years but this one really makes me sad. Life goes on, I guess.