My 17 year old son was shot and killed on Mother's Day this year.  I'm overwhelmed with sadness and anger and guilt and so many other emotions that I can't seem to control it all.  I'm easily agitated by those I love and I can't focus on anything long enough to complete a task.  My heart has this deep ache.  I want people to know that he is gone because I feel like it defines me as a person but at the same time I don't want people to say the wrong thing to me for fear I might flip out.  But…