My boyfriend's female friend just blocked me on Facebook?

I noticed her comment below one of his pics was gone. Out of curiosity, I went to see if maybe he deleted her or vice versa. I didn't see her on his friends list. I brought her name up and noticed it said content unavailable. I've been blocked and have blocked people and that's what it says when you're blocked.
I don't understand why she would block me when I haven't even talked to her? I know they used to hang out, he said only as friends, but now I don't know what to think? I have always had a bad vibe about her and if they really were just platonic. I text him earlier that I noticed she blocked me and that it seemed fishy. I don't know what to think or do about it. It's making me uncomfortable because obviously something happened to make her do such a thing.
My boyfriend's female friend just blocked me on Facebook?
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