and acting differently is a sign that something might be up?
Yes, they may change the way the act . They might start to do poorly in work or school and they might act violently or take risks
is there any place that I can go online to read more on this?
You can get more information on our websites, we have info on suicide prevention and the support we offer.  You can also go to the Make the Connection website to get resources and watch stories of Veterans who have overcome depression