Am I wrong or is my friend controlling?

Me and my 2 best friends are really great friends, very close, and have been for about a year (since senior year.) One of these friends moved to college about 10 hours away and doesn't really talk to her "boyfriend" anymore. They are an off-on couple and she changes her mind if she loves him or is done with him every week. Whenever she is upset or mad about being far away or about this guy, she takes it out on me. Yesterday she cursed me out because I liked his facebook status about the superbowl and commented a picture somebody tagged of him. Apparently this makes me a bad friend because she hates him again. Last week she was in "love" with him. I know this sounds like bullsh** highschool drama but I'm only asking because I'd really like to know if this is wrong? I feel as though she is disrespecting me by taking her anger out on me and trying to control what I do on a social networking sight? I think it's ridiculous but apparently she doesn't.