Why do people ignore me when I talk to them or be nice to them?

So we got back from an awesome trip and when we were waiting for the others, my cousin’s girlfriends (let’s call her Madi) older sister (let’s call her Tori) was so snarky. She didn’t even stop to say hi or goodbye. My mom and I were sitting and my mom said, “Hey” and I said, “Hey girl hey.” Tori was like, “We gotta go! We have a plain to catch.” I said by to her and she said, “I SAID we have a plane to catch! I don’t want to talk to you. WE HAVE TO GO.” And walked off. Wow…. so rude. I said by to her daughter but she looked at me and walked away from he. Her husband and son didn’t look out way.

So DAMN rude! They’re usually very sweet and kind hearted people, but they have to have an rotten attitude. Tori is a sweet woman but man her attitude is rotten sometimes. We can’t fix what we can’t control. That’s what Madi said.

Madi said she tried calling her sister Tori but she didn’t answer or call back. I texted Madi just now to see if she heard from Tori but she said Tori hasn’t called or messaged back. Tori is sweet but she’s sounds so mean. I can’t believe she said she didn’t want to talk to me.
Im the kind of person that thinks people should be nice and always answer back but people do the opposite. Why are kind people so mean sometimes?

Updates
7 mo
I’m autistic and it hurts when people are mean to me or whatever. Her kids ignored me. I know I don’t know the well which is normal. Her daughter have me a look when I was trying to say by to her. Last night Tori, her husband and kids ignored me and walked right pass me and I waved at the. Is it my size (5’10, 244lbs)?
Updates
7 mo
Madi is way nicer than Tori because as an ATTITUDE! Their mom should’ve checked her attitude years ago.
Why do people ignore me when I talk to them or be nice to them?
Post Opinion