I Am Trying To Help My Son, I Think He

I am trying to help my son, I think he has a sever depression. He goes from normal to agetated to almost deliosional in a short time. He has sever ptsd and served in the Iraq war at 20 &21 . He served in hand to hand combat. He has no home no car nothing. He left my house in the middle of the nite last nite. I know he is ok He sent me a text and said I love u. Then did I want to meet him at the train to say goodbye He said I don't love him enough I don't pay enough attention to him. He said we beat him as a child his father, he did not. He goes from relationship to relationship...He says I won't bond with him. I pay more attention to our granddaughter I could go on and on and on