I lost a really good friend after coming out to her too. We met in college and kind of became go-to friends for all our nature activities. There were a lot of hiking and camping trips, corn maze visits, vegan cookouts, and we were really open with each other and we'd regularly discuss life and struggles. It was really nice.
I thought she'd be the most supportive because she was queer too (but also cis), and she said a lot of really nice, supportive things in the moment, but then not long after she got really distant, never had time to meet up, and would only occasionally reply to messages, and eventually checked no on my wedding invitations. Months ago, long after I thought we were out of touch for good, she texted me sharing her wedding pictures and she hadn't even mentioned to me she got engaged. I replied with my wedding pictures and we're back to radio silence, which is okay, but sad.
After I moved to a new city, I was planning my wedding and my best friend's wife ended up backing out on being maid of honor, which made me realize I had no bridesmaids. All my friends now are guys, and they live two hours away and only ever want to play video games and not do outdoor stuff. Someday I hope to make a new IRL friend, but it's hard to meet people as an adult.