Girl's Behavior

How do it get her off my back, I dont want to her to think we are friends?

We work in the same building and known each other for 6 plus years I think she did had feelings for me but didn't pursue (at the time didn't want to shit where I eat) so end up In friendzone. Around that time she started to complain to me about a guy that she end up dating. I told her few times I'm not an emotional tampon and said respect that but last time she bring him up she try to bring up her past so I walked out on her silly ass. I end up cutting her off on social media and such and told her we are not friends and said its cool but I want her to cut me off for good b/c her bringing up her boyfriend problems when I told her not to is disrespectful and she knows I dont take crap. I'm only upset out of principle. It may sound harsh but I dont want to be involve with any female unless sex and/or relationship is involve or if I'm benefit from it somehow.
How do it get her off my back, I dont want to her to think we are friends?
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