Metaphorical Vent? I don't know, I'm just a bummer

Some days, most days, it feels like I'm a kid again and I'm looking out of a window into all these other fenced yards. Each yard has a group of kids playing and having fun together. Even thought I play in the same way, I feel as though something about what I do will be wrong or lacking.

 Sometimes they will invite me to play. I'll cautiously open the window just for a little while, before feeling afraid and lock it again. What if I waste their time? But the others go back to playing, already forgetting that I was even slightly present.

There is no yard I fit in to, there is no group of other kids that I play correctly with. I want to be around others and interact with others, but I am not enough. I will never be enough, do enough, or be good enough.

So I close the curtains to my little window and talk to myself