AITA for losing a friend?

Katrina (I’ll call her; all names are fake) turned out to be the type of person who ignored me the minute she got a boyfriend. We were incredibly close before she started dating. Close to the point where she considered dating me, but we were long distance and I didn’t see her that way. Then she started dating Anthony, and I was pretty much nonexistent from her life from then on. It hurt a lot. It showed me how much I actually meant to her - disposable. So I continued being nice to her when she did pay attention to me. I was going to let her get rid of me when she felt it was time.

The time did come. Thanksgiving. Leading up to Thanksgiving, there had been times when people would unnecessarily tag me in their life events on Facebook, such as a baby picture or a making-out picture (one person does this literally all the time. Any time she posts a baby picture or a picture with her and her “hubby hub hub”, she’s always tagging me; and I’m not involved with her in any way). So every time Sierra did that, I would rant to Katrina how annoyed I was, and how annoying it is for people to tag me on their life events on Facebook if I’m not involved. So she had some level of understanding when she did exactly that on Thanksgiving Day. I woke up to a Facebook post in which Katrina posted a photo of her and her boyfriend with the caption “I’m so thankful for my boyfriend, my most favorite person ever, on this Thanksgiving Day”. I was tagged in it. I texted her that day and asked her to untag me from that post. Well, that was a mistake. She got suuuuuuuuper pissed off at me, claiming I don’t appreciate her as a friend, and I’m bitter because she has a boyfriend, and that she was trying to be nice to me on a day thanking friends and family and showing appreciation. She unfriended me and blocked me, then called me a manipulative asshole who is a lonely bitter incel who can’t accept the fact everyone around me is in love and I’ll never find love because of that.