I need some advice

Long story short

I found out today, that I’m pregnant by a person that was cool at first, now, he’s mean as hell to me, disrespectful, when I would text him, he just seemed so bothered. So Friday, I told him I was stepping back from him. He doesn’t seem to want me in his life by the way he been treating me so I thought the was right thing.

Idk I guess the advice I want is what would you do? Would you tell him? Or would you just go on about your life?