I need some help

I've been doing LRT with almost immediate results, she has been asking about my day, wanted to watch a movie together on the couch, and generally getting on fine.

She had blocked me on Facebook as I put a status on there a few weeks ago accusing her of cheating.

About an hour ago she mentions unblocking me, I thought nothing of it.
A friend then texts me and tells me she's put this as a status. "Hello and welcome to the singles club"

This was around the time she unblocked me.

To clarify, no arguments, me being cool with her, no questioning, no neediness etc. She posts that whilst sitting with me, then goes to bed

I broke the LRT and asked about it, she loses her temper and starts blaming me for starting it, and saying she can do what she wants etc.

My head is going to explode, it comes across as spiteful to suddenly unblock me on Facebook and then post that , seemingly with the idea I would see it and go mad about it.

Why would she do that after we've been getting on so well ?