AITAH for being mad at my friend this long?

(It's another thing with Vc if you've read my other posts)

I’m 15 years old, in 9th grade, and as some of you might know from my other posts, I’ve been having problems with Vc. I found out about a week ago that Vc falsely reported me, saying I said something to her, which I didn’t because I’ve been avoiding her for the past month.

My friend (let's call him Potter) became friends with Vc, and I was upset. Vc is not a good person, and the fact that she’s friends with him really stresses me out. After he became friends with her, he started acting secretive, and I can’t shake this feeling in my stomach, like something bad is about to happen.

I’m scared they’re talking behind my back, because that’s what another friend said Vc did to them when they were friends with her. All Vc did when she talked to that friend was ramble about how much she hated me. When my other friend, Michael, asked Potter what was going on, Potter snapped and said, "I’m not abandoning a friend just because you guys don’t like her," but we never asked him to do that.

Potter and Vc have only been friends for a few weeks, maybe even just a few days. But Vc lied and said she’d been friends with Potter for over two years. That’s obviously a lie because back in 2024, ( when we were friends) Vc told me she hated Potter and always avoided him because of something he said to one of her old friends and what Potter’s ex told her.

I’m not trying to control Potter, I just feel hurt and betrayed. I’m upset that he became friends with someone who’s wronged me, especially just weeks after everything happened. I know it’s not my place to decide who he should or shouldn’t be friends with, but I can’t help but feel scared.

I don’t know what to do, and it’s tearing me up inside.