Monica and Lou's relationship

However, even though Monica Fanning is more open about her feelings than Deputy Darla or Violet Love, Lou Richardson seems oblivious to the feelings she has for him, and only thinks of her as a friend.

Monica's opinion of Lou
Monica harbors an unrequited love for Lou, but unlike her best friend, she is more open about these feelings. She often goes over to Lou, and asks him if he likes her. Unfortunately, Marcie is always rebuffed by Lou, as he never quite gets the message, even when Monica outright tells him that she likes him.

Monica seems to have fallen for Lou the first time she saw him, and has had a crush on him ever since. She shows her affection for him in many ways, for instance, telling him he is cute, asking him to hold her hand, calling him "Louis", sometimes kissing him, and even outright telling him she likes him and asking if he likes her back. However, despite all her attempts to get his attention, she never succeeds (though after one kiss he stood there wide-eyed in wonder with his hat hovering over his head), as Charlie Brown fails to recognize the feelings she has for him. Despite this, Marcie never gives up, and always tries to get him to notice her.

When Monica is not trying to get Lou's attention, she acts very kindly towards him, and offers him advice, and makes him feel good.

Lou's opinion of Monica
Lou is shown to have a crush on Monica. Despite Monica often telling Lou that she likes him, and sometimes Clover telling him that Monica likes him, Lou is oblivious to Monica's feeling towards him. This could be the result of Lou being unaccustomed to the idea of anyone liking him.