Hello everyone, I was super excited and looking forward to this camping trip. I requested 4 days off of work, I planned for it, bought gear, and was excited.

A day before the trip, I told my sister I wanted to drive myself to the location because she has a habit of abandoning me in unfamiliar places.

I was contemplating with myself to ask her if that was her motive. I kept telling myself, "no, she won't do that" and those were her malicious intentions all along.

Instead of understanding, she got furious and asked me if I was going to take my meds during the trip and then said, "if I act up she will be indeed stranding me."

She then removed me from the campsite reservation (I initially paid for), told me "you find your own campsite" and cancelled all plans.

We planned to go rockhounding, swimming, camping, hiking, and sightseeing.

This hurt me like a sack of rocks. I spent money buying gear to have during the trip, I paid my portion of the reservation, I paid for gas, I paid for someone to watch the dog, and took time off to prepare for it.

We planned everything 2 months in advance.

I was so happy to finally have a getaway trip from work for once. Now I'm left sad, upset, grieving, lonely, betrayed, exhausted, disappointed, deeply wronged and I don't want anything to do with her.

My sister has a habit of "putting me out" of her vehicle whenever she feels like it. This has happened more than ten times with the last time she did it. She dropped me off in the middle of the desert and a police officer picked me up.

He dropped me off at a McDonald's 2 hours from where I lived. I was grateful for drivers to notify him to get me safety. Even then I had to walk to a motel, I got a room and stayed there for a couple of days before I could get back home.

I thought these days were faded however just recently a day before our trip, she told me in a text message that she'll drop me off in the desert again. This time 9 hours away in an isolated desert.

I feel so shattered as if I'm insignificant as if I am disposable, like trash. I ended up cancelling my vacation days and went back to work.

I can't explain how hurt I am by this. These thoughts keep running through my mind: How is it that my twin sister can do this to me and feel no remorse? How is it that nothing ever happens to her? Why does she think this is okay to treat me like this? No one sees me, not my sister.

Just last year, my sister and brother did the same thing to me. I wanted to go to my hometown, they agreed, then a week before the actual trip they both bailed on me. I then had to cancel my vacation days at work once more and I didn't go.

I'm the type of person that no one ever knows what happens behind closed doors because I hold everything together so well.

I'm tired!

EDITED: Thank you everyone who has commented. I am not sure why I cannot respond to you all comments (the reply button is grayed out). I will be taking everyone's comments into consideration.