I need help.

So, I have this trust issue with my friends since my best friend kinda ditched and snitched on me. So I made an alt account and started to follow all of my friends on Instagram. One of their story was a selfie of my best friend which betrayed me. So I replied on my alt, "Who is she?". And they asked me who I am, so I said "I don't tell strangers my name." Few days later, I am not sure how but everyone was trying to figure out who it was. But apparently someone framed one of my friends. I was feeling guilty buy I was also thinking about framing her aswell to make my escape. I am not sure how but everyone started hating the girl which was framed while I did nothing on that account. I was threatened that they would report me to the deputy principal if I didn't tell them my name. After lots of lying, I eventually said my name. They were disgusted. I don't even know why though, it's not like I did anything bad and I didn't say I was anyone before. It was their fault thinking and framing someone else.

Am I the bad person for not telling the truth early? I was pretty scared though. I feel really guilty and want to kms rn please help me.