Broken Relationship with My Sister

My sister used to be my ride or die. We lost our mom to suicide when I was 18 and she was 13. I’ve been looking out for her since then. We’ve been close our whole lives. She got married .. so the relationship broke down a little from that understandably. We play video games together and way back when, we met a mutual friend. He tried getting with me and I said no. He then proceeded to try and get with my sister knowing damn well he’s married. Long story short .. his wife forgave him and now my sister and him are best friends. They talk all day .. all night. I don’t remember the last time her and I even had a decent conversation. It’s not even a jealousy thing for me. I just see him as fishy and disgusting. He is borderline obsessed with her with his actions towards her.

Anyway .. I’ve lived a couple hours from my family for almost 10 years. I’ve gone up there I have no idea how many times. Sometimes every weekend I would go up there. They have been to visit me three times in almost 10 years. It’s crappy and not fair to me tbh. This weekend, my sister not only got two days off of work but is driving four hours to spend the whole weekend with that guy mentioned before. She has changed plans on me the past few times .. but has no problem dropping everything for this “best friend”. I already told her I’m only visiting her and the family on holidays now because I shouldn’t be the only one making time to see them.

My sister has depression and I have anxiety. She cries at the slightest familial issue and also runs to her bestie with anything (she tells him stuff that is none of his business - she told him [knowing I don’t like him] about me dating one of our mutual friends when it wasn’t her info to tell which is what led to our initial fallout). I’m anxious because I don’t want her to be depressed over me telling her how it is but I’m also seeing the BS in me having to put forth all the effort in order to see my family. I just don’t want her hurt over it .. but I also don’t deserve to feel this alone all the time 🤷🏽‍♀️

This was partially a rant .. but more so explaining the situation and wanting to know if anyone else has dealt with a situation like this and how they’re handling it.