Not gonna lie here: They all look like the same picture over and over again. Did you copy-paste a base of the face and just change the emotions? Unless she's really not very emotive, there should be some more exaggeration in not the way the mouth and eyes look, but also the face and hair. Communication in the body language is just as important as the facial expression.
Something that you can do to make this more apparent is to squash and stretch the face (you don't have to be so ridgid). Also change the volume of the hair: make the hair more flat when she's bored or sad and more poofy when she's happy or surprised. Also, don't be afraid to use hands in these types of memes. Emotion is just as important in the placement of the hands.