Schroeder is a fictional character in the long-running comic strip Peanuts, created by Charles M. Schulz. He is distinguished by his precocious skill at playing the toy piano, as well as by his love of classical music and the composer Ludwig van Beethoven in particular. Schroeder is also the catcher on Charlie Brown's baseball team, though he is always seen walking back to the mound with the baseball, never throwing it--admitting in one strip he did not want the other team to discover his lack of ability. He is also the object of the unrequited infatuation of Lucy van Pelt, who constantly leans on Schroeder's piano, much to Schroeder's annoyance.

For the most part, Schroeder and Charlie Brown were the best of friends, with the exception of one argument from the mid-1950s (when the two were fighting over who was greater: Beethoven or Davy Crockett) where Charlie Brown insulted his "yellow hair" and "plink, plink, plink all day long [on his piano]" and Schroeder countered with a barb at Charlie's coonskin cap and "round head." During conferences on the pitcher's mound, the two engage in unusual conversations, mostly about Beethoven and hand signals. Schroeder also often encourages Charlie Brown during games, while the rest of the team says, "Don't let us down by showing up!" In the animated cartoon, he limits Charlie Brown to only two pitches, a high and low straight ball.  Schroeder's most significant act of friendship came in Be My Valentine, Charlie Brown. When Violet offers Charlie Brown one of her used Valentine cards (since Charlie received no Valentines the previous day at his school's party), Schroeder thoroughly chastises her, Frieda, Lucy and Sally for their disregard for his feelings and their selfish motive of relieving their guilt. Charlie Brown, however, tells the girls not to listen to him and accepts the card, although he expresses appreciation for Schroeder's gesture.  Charlie Brown is one of the few people Schroeder will allow to lounge against his piano, as he and Charlie Brown are good friends, and knows that Charlie Brown respects his love of Beethoven. When they were younger, Charlie Brown would read Schroeder the story of Beethoven's life. Charlie Brown was also the one who introduced Schroeder to the piano. Schroeder also generally does not mind Snoopy lounging against his piano until, moved by the music, Snoopy generally ends up dancing on top of the piano, much to Schroeder's annoyance. In one famous scene of A Charlie Brown Christmas, Schroeder is playing part of Linus and Lucy and Snoopy comes out of nowhere and starts dancing on the piano, until Schroeder and Lucy start looking at him angrily and Snoopy stops dancing and looks embarrassed. Answer this question using a quote from the following article:

Did they stop being friends for a min?