Why did my girlfriend suddenly ghosts me and then break up out of nowhere?

So, one day me and my girlfriend were chatting but suddenly she ghosted me mid convo. I dont understand the reason why but then I didn't message her anything for 2 days. Nor she said anything for 2 days. I thought she needed space or its an emergency..
Then out of no where, when I wake up the first thing I see is her message and she said "Lets stop dating" and just blocked me?
Like what? Does she always want me to initiate the conversation?

Why did my girlfriend suddenly ghosts me and then break up out of nowhere?
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