I'm so depressed

I don't know what to do anymore. None of my friends call on me anymore to do stuff with them and I would call on them but I never know what to talk about to them. Also the girl I love is in the other class i'm too afraid to tell her that I love her, my dad says to lead up to telling her that I love her and I know that but there is this new guy in the other class that I know she's going fall in love with him. I feel like everybody ignores me like i'm invisible to them. One night I tried to kill myself my suffocating myself with a pillow. I would go see a phsychiatrist but I just don't know if they could help me. The best thing to do would probably just to hang myself. I mean who would even care if I died???