I don't know what to do

I just wanted to vent and say how I feel, I don't know what to do anymore, I don't know how to continue with this. I feel very tired, depressed, alone. I can't talk to anyone, I feel like talking to support groups doesn't make me better either. I feel totally sunk, I want to feel good but I am not able to do anything for myself. I was seriously thinking about committing suicide. Even though it is an idea that terrifies me a lot, I can't find a solution to my problems.