<human>: Tried to restart things with ex of 2 years and it didn't work out. He ended things about a month ago and later I found out he was sleeping with multiple people at the same time as me. 

That's fine. The problem is when I went to get checked for STIs and found out I'm pregnant. 

I'm in no way emotionally or financially ready for a child and I'm scheduling an abortion as soon as possible.

Ex and I had discussed the possibility of this happening while dating and he said he would fully support my decision to abort.

Because I know this, I'm debating whether or not I should tell him at all. 

And yes, I was on birth control.

Provide a brief overview of the text.
<bot>: Should I tell my ex I'm getting an abortion even though I have no desire to contact him and it wouldn't change my decision?