Why did this girl I haven’t talked to in a while unfriend me on Facebook?

I was kind of interested in her until I found out she had a boyfriend and had differences that would make me less interested in her.

Long story short she was this girl I saw at my local mall pretty frequently a few years ago (in 2018.)
I actually gave her a bunch of business advice about opening a restaurant (because she was talking wanting to do that and I told her I had a business degree.)
I friended her on Facebook something around then.
Then she stopped working at the mall and I haven’t seen her since the summer of 2018.

I checked every once in a while to see if she made any progress in the restaurant business but nothing seems to have happened with that.
A few months ago she said she got another job so I asked her about her plan to start a restaurant, she just says she is still planning to but not yet.
Then I checked yesterday and we weren’t friends on Facebook anymore.

I’m not sure why she would choose to unfriend me; I do make edgy political posts but that hasn’t bothered her before.
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Anyone else?
Why did this girl I haven’t talked to in a while unfriend me on Facebook?
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