Okay. There is a difference between showing emotions and being moody like a pregnant woman during her worst mood swings. You are writing about a teenager - ok, he's moody, ok, he had some really bad experiences - but don't go overboard. Or you should at least try to explain his feelings...
If you post stories, you have to face criticism - good and bad. You cannot simply ignore those who have a different opinion - well, you can but that would mean you're a coward.
I do not care for the length of the chapter - as long as it is well-written and not some piece of junk everyone could come up with.
This is something I find to be severely lacking. Your story is just some copy of better stories.
Try to use some unique ideas or write chlichés in a way so that they appear to be unique.