New here

Hello all.
Don’t know how to start really. I’m 24 y.o. and i’m dealing with suicide thoughts over a 10 years now. I’m kinda ”controlling” it with drugs and weed, but once i stop using everything i become suicidal and auto destructive. I don’t know how to maintain my good mood when i’m clear, i can’t live like that anymore. I didn’t use anything for 3 days now. I just drink water, i don’t eat or sleep. I work 10 hours a day just to keep my brain occupied.
And it doesn’t matter if i’m alone, with my friend or when i was with my ex there’s enormous wish in my head to destroy myself.
Does anyone understand me?