i haven't been cutting for very long, but i know how easy it is to become dependant on it. good job with 19 months, i couldn't last that long. its hard. i think if you're really serious about quitting you should talk to a doctor, if you want to keep it personal, try thinking posavtive. i know its not easy, i'm trying to quit and i give in easily. But as long as your determined, you can do anything, have faith in yourself and you'll get through this.

let jesus set you free and heal you and fill you with love

First of all, 19 months, congrats!!

But please dont let them hard 19 months be for nothing, as easy as it may be to fall back into a cycle of self-harm, if you stopped once you can stop again.
I have no expierance of this as i never went through it myself, but i have heard of people putting an elastic band around thier wrist and every time they felt like cutting, they just ping the elastic band, and ran up and down on stairs for example, to take their minds off it.

I really hope you realise YOU ARE BETTER THAN THIS, and you CAN overcome it.

Best wishes!