Q&A: Would moving and loss of friends cause me to get sick and lead to depression?
Yes, the circumstances you describe may lead to depression, and I'm sorry you had to experience them. It can be helpful for you to understand that you don't have to continue to be depressed for the rest of your life. Help is available so you can deal with your depression, better understand the circumstances that led to the depression, and move forward in having the life you want.
Dear Dadream, The answer to your question regarding depression is that usually comes from many contributing factors. Yes, your fourth grade experience must have been very difficult for you, and could have well contributed, but research is showing that depression can have a biological link as well. You may want to speak with a therapist if you are feeling depressed.