For a child to lose a parent, either though death or through divorce is a traumatic event. Depression is suppressed anger, grief and desperation. Whenever one parent speaks in a derogatory tone about the other, the child is shamed. The child knows that it was created by the parents, and therefore if there is something wrong with a parent, the child assumes that it too is bad. You have no need to look into past lives to solve this issue, perhaps only into the recent past.
Secrets are also important.
Whilst it is not appropriate to inform your child of everything you do, family secrets do cause distress for a child as the child knows on a deeper level what is going on. My suggestion to you is that you look very closely at yourself and at our conduct and feelings concerning your divorce and the departure of your sons father. It is important that you do this. AskSpirit is a free service, and as such, it generates much response from readers all over the world. As there has been so much response, we are not able to answer all questions that are sent, and also choose not to answer certain types of questions.