AITA for calling out my friend on lying about another boys name

I am 17F and my friend is also 17F. We are close mostly because our families are extremely close. Our lives are very intertwined, which is why this feels so unnecessarily messy.

Last week she snapped me panicking because a random number kept calling her. She said she was scared to answer and begged me to call instead. I told her to just pick up, but she refused, so I did it for her.

It turned out to be a semi popular vietnamese basketball player, well call him Alex. Tall, calm, deep voice, not giving weird vibes at all. Unfortunately, we clicked immediately. We spoke all night, laughed, had our fair share of pillow talk, but like the chemistry was very obvious and the conversation went on for a while, (5 hours AND falling asleep).

During the call, her name came up. I fully believed he was her ex because that is exactly how she had always described him to me. She like had told me stories about him before that were not flattering, so in my head this was very much in the past and not something she cared about anymore. We talked about her casually and then moved on.

Later that night I found out the truth. They never dated. Not even close. No talking stage, no situationship, nothing. Just a Snap streak. That was it. This really like irritated me because I had just dealt with a guy at my school telling people we had done stuff when literally all we did was snap. I would send normal face pics after showering with wet hair and a hoodie on, fully clothed, and somehow that turned into a whole fake hookup story. So finding out my friend had basically done the same exaggeration but expected loyalty from me did not sit right.

The next day I posted something on my private story about boys exaggerating situationships. No names, no details, nothing identifiable. Just jokes and basketball metaphors about people thinking they are starters when they are actually sitting on the bench. If you did not know the context, it was meaningless. She watched it and then completely ghosted me. No explanation, no conversation, just silence for a full week.

What makes this even more annoying is that there is history. We (alex and i) have made out at a party before, and hung out in a group but that was before she even knew me properly and it has never been an issue. She has also repeatedly tried to plan hangouts with a guy I openly liked, even after I said I was interested, so this is not new behavior. It just feels like the rules only apply when she is uncomfortable.