Simply inform them that you'll spend the night at your bf's. That's part of what it means to be considerate.

Maybe it's unfathomable to you, but in all likelihood they actually care, and were worried about you so they raised hell. Why else would they phone up everybody and their dog. They wouldn't take the effort of raising you and pay for your bloody living costs if they didn't. The same applies to your mother's.

Your mom is a grownup and responsible for her own decisions, including for taking decisions that led to her still needing parental support. It's her choice to never have grown up, to still depend on her parents. The only one to blame for her inaction is her.

The only ones who look good in this story are your grandparents. You're still half a child so you get half of a pass, but your mother does not.

TLDR; "I went behind my boss' back, badmouther her to her superior and got her fired. Now that she's no longer protecting I'm the next in the line of fire."

Looks like you get what you deserve.

Never confess (unless warranted by the situation or partner's enquiry) just to offload the guilt. It serves noone, the guilt is yours alone to bear. It's stupid to add another mistake to the first one.

Friendzone means you're still communicating, what you describe sounds like you got ghosted. But she didn't block you, there's a gazillion possible reasons for that. See how she reacts next time you encounter her.

So, you let all the traditional women serve and feed you while you keep looking down on everybody while you benefit from that very thing you claim to despise.

Yup, YFU.

That's how you tell me you're a hardcore feminist without telling me you're a hardcore feminist.

Nonsense, OP is 18 and adult.

No need to be horrified. She'll ask about whatever she saw, if anything.