Dear Bella,
I echo what the others have said. The right thing to do, is never easy. I've had to do the same on occasion, to give myself respite from the madness of it all.
My son does exactly the same - ignores me, thinking that this upsets me. If truth be told, I'd rather he ignored me, when he is actively using, as life is peaceful.
it's sad, and unfortunate, that we have to make these choices, but, we deserve a life too. And we need to be be mindful of our own physical and emotional well-being.
Sending a hug
Much Love
Bute x