This probably doesn’t mean anything but some of the posts she likes on twitter are about quiet things lol. Like this post that said ur so quiet” thanks my brain is broken and i have no thoughts. & “ur so quiet” thanks i’m scared that i’ll get ignored again.& another post that said why you so quiet? What’s on your mind? But I might be overthinking it & it may not mean anything. maybe she just likes the post because maybe she knows someone who is quiet or something or maybe not.