For Charlie Brown, his life wouldn't get any better. He can't win a single baseball game, can't even kick a football because when he does, Lucy will pull it away anand he will fall on his ass. Even worse, he didn't have the courage to go see the Little Red Haired Girl.
He knew life would go on as normal. That is until one day after losing yet another baseball game, he then said very loudly "God Dammit! We lost another fucking game because you guys weren't paying any attention at all. I can't believe we can't win one single damn game! This is why you assholes never give a fuck for me. It's because you would rather let me die than let me be your friend. This is why I can't trust you guys at all."
A day later after his meltdown, his mother grounded him for not giving his friends another chance. He felt bad because he wished he hadn't say those things. He thought to himself "Man, what have I done? I yell at my friends for not winning the game and i'm to blame. I don't think they ever want to see me again after what I said. I have to talk to them and let them know I was a total jerk and that I want them on the team."
A week later, Charlie Brown saw his team and decided to have a talk with them. Once he got them together, he then said "Team, there's something I need to tell you. I'm sorry for what happened last week. First of all, I shouldn't have said those things to you because I wasn't thinking at all. I want you all to know that I take back all those things I said to you. I know you still hate me but can you at least find it in you to forgive?"
The others thought about it for a few minutes and they decided to accept his apology. Once that was done, charlie brown and his team got to play baseball again and sure, they may have lost again but at least their friendship is much better than last week.
So, the lesson is: always apologize because if you don't, you will be a jerk and also forgiveness is not the same as forgetting.