She is not responsible for you and your illness and is not your girlfriend just to give you attention and watch over you so you do not kill yourself! What do you think she can do to help other than to let you know she cares (doesn't want you to kill yourself and she would be very sad)? If you do not work to recognize and treat your depression, accept yourself (so you cry and you're a boy and it is uncomfortable; either you trust those you are with to be with and help comfort you when that happens, to wait until you can talk again to help you with what has made you suddenly feel so sad upset, etc. or you will be stuck with just yourself and talking to people on chat instead of in person?) and live the best life you can while you are working to treat your illness then I do not know what someone else can do better?