My fiancè is upset I responded to this: Am I wrong?

I'm trying to understand fiancè 's perspective. I don't think I'm wrong but she does. I was hoping other women could share their opinions with me. My ex best friend made a TikTok about me that got me a lot of hate. There's a trend where people use this song/sound "Everyone's a feminist until their is a spider around" and they talk about problems they've faced and his was about me claiming to be an LGBT ally but once I got with my fiancè and she said she wasn't comfortable with our friendship I dumped him after 17 years of friendship and he said "Everyone is an ally until their reputations on the line." I was pissed tf off because he was not in anyway honest about why our friendship ended. My fiancè told me not to respond because that's what he wants and it will just fuel the flames but he showed our old text messages and some of his followers have been harassing me and my fiancè. So I made a TikTok, stitched his and made a two part TikTok explaining why our friendship ended. He had a crush on me and I declined but still wanted to be friends. He said okay. But he kept talking about us dating. I'm straight but do consider myself an Ally. My best friend was gay, my brother's gay, my dad is bi. I am a supporter. But he continued to push a relationship and was awful to my fiancè when we started dating. I got so tired of him I started avoiding him. We hung out on my 29th birthday and he offered my drugs. I struggled with drug addiction from 16 to 25 so I was 3 years sober when he offered. I said no and was angry he even offered and he kept pushing it and I made the decision to break my sobriety. That's on me. I chose to do drugs again that would possibly cost my my girlfriend and everything. But they made me feel weird and I was throwing up all over the place. He said he called my girlfriend to get me and I laid on his couch and woke up to him having sex with me. And I've never used the R word to describe what happened. I don't hate him. I didn't then. I don't know. I don't want him to rot in prison forever, but I was upset. My girlfriend (now fiancè) found out and she didn't blame me but told me if I didn't go to rehab and end the friendship she couldn't be with me anymore. Had she given me the ultimatum before this I wouldn't have chosen her because I don't do ultimatums. But that was the push I needed to end the friendship and I have texts of him apologizing to me. Fia year and a half he texted from different numbers trying to be friends again. My fiancè and I are having our first baby. I haven't been friends with this guy in 7 years. I was getting hate left and right. My fiancè said silence is best and I tried to be silent but I got fed up and made a two part TikTok telling what actually happened. She's upset with everything and said I should have not said anything. Am I wrong and if so how can I make it better?