The Lonely Smile

When a person is walking all by him or herself and they are smiling its really nice. You know that that person is just so happy at that moment in his/her life. I really want to know what they are so happy about. I thought of this because I just did it. Its really nice and happy and then you notice someone spots you smiling to yourself and then its not as happy anymore because you just feel weird. But its really funny to be all alone and just walking, yet so happy that you can't hide smiling. Sometimes I am so close to reaching laughter but I try so hard to hold it in, cause who laughs to themselves? That would actually be scary. But I feel that funny things happen to me and then I will be walking down a long hallway and boom it pops into my head and I really need to laugh. So there I am walking alone and smiling my face off. Then people look at me and I wish I wasn't. But I really like when I see people doing that so I guess it is ok that I do it. It is kinda a day brightener. If I see someone smiling all to their lonesome, I start smiling cause they look so funny.
The worst is when people would ask what you are smiling about. Because it could be something so random. Something most likely from last night, but I have been caught to be smiling at a childhood memory. Then when they ask, I just feel weird saying, "Oh I was just laughing when I was 4 and my sister took my face and smashed it on our coffee table cause she was mad at me and I have a scar from it but now I was just thinking what my parents were thinking when it happened cause thats so violent so I decided to think about it as I'm walking from English to Differential Equations". So the lonely smile is a lot better when you see people you don't know doing it, or people you don't know see you doing it because when you have to talk about it, it ruins all the fun.