Lonely without social connections

Oh man, today was rough. My older half-sis has been going off on me for days through emails, texts, even showed up at my house like a scene out of a bad movie. She's throwing false accusations at me about being a lousy executor and working on stuff without her input, trying to get under my skin. Honestly, all this back-and-forth is just exhausting.So I decided to ignore it instead of replying-because, y'know, what's the point?

But then she got so intense that I started tearing up from being emotionally drained. Tries to push me over and no one's there to understand where I'm coming from without going through all the backstory again. No one was there for me when I needed them.

So I called two mental health hotlines-one after the oter, each chat lasted about 20 minutes or so-and explained what was going on. I told them I wasn't feeling suicidal or anything like that; just mentally abused by this blood relative who's been at it for ages. After hanging up with the counselors, I had an appointment with my counselor from school where we talked through everything and she suggested blocking her number to avoid those harassing texts and advised me on getting a restraining order to keep her away from my house.

She also offered to write me a letter of reference if needed as proof for my mental health. Itt's pretty sad that I don't have any real connections-like colleagues or friends-who would be there in times like these, even just to attend court hearings and stuff when it all gets legal.

I'm reaching out here hoping someone can offer some advice on how to build supportive friendships during such tough times. Or maybe share if you had similar situations and what helped you through. Appreciate any feedback!