Why did my ex girlfriend unblock me on Facebook after 5 months but not on any other social media and then block me again, is it because I reached out?

Anonymous
I'm aware that you have to wait 48h to block someone again after unblocking them, I sent her a friend request and she declined it and the option to add her dissappeard from her profile, I sent her a message to ask how she was as I still care and love her but it must have been a message request, did she unblock me to snoop on me as my profile is public and why unblock me to block me again
Why did my ex girlfriend unblock me on Facebook after 5 months but not on any other social media and then block me again, is it because I reached out?
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