By the way, I should mention that when I say everyone in my dream becomes annoyed and then ignored me, it wasn't only the people I already met in the dream, but even strangers, like everyone in the "world" suddenly began ignoring me.
Thank you CANDC for the link.That was interesting to read through. I agree that nightmares probably have deeper meanings.
Thank you mike1127. That sounds very correct about being closed in. My bad dreams are usually dark, although not necessarily closed-in. They often have to do with me traveling across a land to different "buildings" or places that are closed in like a building in order to do things. This dream fits that type. Well, I think this "everyone turning against me dream" has been going for a long time.

This next text is a trigger:
I think it began because when I was a kid, and before I made any longish-term friends, I was bullied by family members. They were around my age and would often befriend any friends I made when I was young, and they would somehow draw them away, which I didn't take personally but my family members didn't include me. They sometimes took what friends I made and had them later making fun of me. The reason they were able to do this? Because they were more "cool." And this continued through my life, plus I was bullied and ignored by other kids throughout much of school... It still affects me even when I've forgotten about it. I just remember my young family members forcing me to do things when adults weren't around or making fun of me, and they'd have this twisted sneer on their faces, like it was the most enjoyable thing in the world. They'd talk about me sometimes like I wasn't even in the room with them, or outright ignore me otherwise. They could turn almost any kid like this, so it made me think that nearly all kids were kind of evil, and since adults were once children, adults must somehow be as well. I've grown up distrusting people mostly, but I still can't forget those sneers and smiles. It's the same an abusive adult family member gave me when I was older when they would emotionally or physically hurt me.