Mental Illness. So save me. please.

I've been literally wanting to cry 24/7 for no reason at all. I feel like nobody wants to understand me and that I'm a problem to everyone. My parents don't seem to understand me, neither do any of my friends. I feel like everyone just wants ne out of their lives. I feel that I've hurt everyone in my life. I so want to die all the time. I tried to kill myself by drowning but I failed miserably. I just want everyone I love to shoot me in the head , all at once. I want to cry all the time. Any random thing reminds me of something and I start crying. I'm becoming a problem to everyone around me. I want to burn myself or jump from a high building or do anything that would undo all the times I've hurt people in my life. I don't want to see my parents at all because I'm nothing but disappointment to them. I've got no reason to live anymore. I don't like anything in my life anymore. I don't want anything from anyone anymore. I just want to die alone. I don't wanna die so save me. Please.😭