She's silly not you. This made me laugh though
I can definitely understand your concern. It's not about the chair but being friends and respecting each other. Is that chair more important to her than your friendship? Now that's an issue.
Don't make up stories until you talk to her about this.
Maybe she always wanted to sit there for whatever reason and it took some time (2-3 years?!) until she couldn't resist anymore. For example, I hate sitting on a chair so that the whole restaurant gets behind my back. I only feel comfortable if there's space in the front of me; even better if nobody can surprise me from behind my back.
The TV part really upsets me. If she'd better watch TV then why does she go at all? I never let people watch TV when I'm around, or, if that's more interesting to them than my person, I leave.
I suggest you to talk to her. If you don't, it's like she has power over you (now the chair, what next?). Don't let it go unnoticed. I'm not saying to hurt her or something. Just ask her politely what's this all about. Come on, it's only a chair (isn't it?
- I'm sorry, I couldn't resist
). Then let us know!