You know what made fangirling easier on my heart & less stressful for me? Putting a stop on the need to be validated by others that you're a TRUE fan. You know your heart better than they do. If you happen to admire other artists and post about them, that's not a betrayal.
That's a freedom you need to be a happier fangirl. If I happen to gush about an actor or actress they don't particularly care about, it's okay if they hate it. It's okay if they cringe. Lol. They can unfollow or mute and that's also okay. I understand.
What's not okay is to go after someone for admiring someone else other than the artist you mutually love. You don't get to dictate who other people support or lift up. Our tastes doesn't have to perfectly match to respect one another.