Real Life Problems

Too late to ask, but I need a believable excuse as to why I can't visit someone.
(My social anxious ass agreed to meet someone I dont particularly like, since I cant seem to say fucking no, and am a fucking doormat)

I accidentally sent my dance video to our science teacher instead of music and now Im dying off embarrassment. I dont know how to unsent this. Is this really the end for me??

I know it's really weird and that's why I need advice about this.
This year both my older sister and my older brother are going to have children. I know it's wonderful and all but at the same time I'm feeling incredibly sad. We're very close and I fear that they start a new life with a new family without me. I know it's selfish and irrational but I can't help feeling that way.
Have anyone ever experienced something like that before ?

when some people are fighting under a question and some people just randomly start sharing all their memes amidst all the drama. i know this is irrelevant but yeah... don't stop sharing memes!

goodnight <3