We have to take a side trip to Pittsville, California to meet up with another reassuring stereotype in Luann De Groot. As we all know, she spent a lot of her teenaged years sitting in her room moping because she threw herself at a boy who just wasn't into anything female because she'd fixated on his appearance while not much wanting to understand the man within and interpreted his politely exiting an awkward moment as meaning that at sixteen, she was going to die a forgotten and unloved old maid.
The reason that I mention this is that she at least was aware of Gunther's feelings for her from the get-go and more or less dismissed him because he wasn't model handsome. This contrasts her with Lizardbreath because the dimwit seemed to make a point of not wanting to see what was right in front of her. This is not just Liz being herself and not noticing that she's not as self-aware as she likes to think she is. This seems to be Liz being so in love with the image of not having anyone attracted to her that she had to reject the evidence of her senses because it didn't fit her reality.