Why did she restrict me on Facebook?

this friend stopped posting for the last month which is absurd since she is queen of posts. Months ago I thought she really liked me, she said no, I was OK and stuff, though I stopped trying to initiate anything with her. After all this time (months) she restricts me or blocks me (not sure which one)! WHY ?! Didn't post any girl pics or insulting things on mine. Just minded my own business. Thing is we still are part of the same group that meets once in a while, but haven't bumped into eachother ever since.
Why did she restrict me on Facebook?
Post Opinion