Not sure what to do about SO

So I am a few weeks pregnant. My so or whatever just had a baby with another girl in December. During her whole pregnancy he saw her and talked to her practically every day. Now that she's had the baby he sees her and the child everyday.

I am not the type to demand or force anything and I told him this. We're good friends and I'm happy I'm pregnant, so i told him ill just kind of do my own thing, but I've been feeling a little weird. I mean he barely talks to me once a week now. And never asks anything about my pregnancy. I just feel like he spent/spends so much time with that girl and just doesn't care if there's time for me. Sorry this is really hard to explain. But I find myself wanting him to care and come to my appointments. I feel like he should want to. or see that I'm okay and have foods or snacks I might want. Idk just the little things. I've been so sick lately I can't clean like I want to without getting dizzy and I can't really drive and shop around.

Anyway he texted me a few days ago and I haven't responded. I was considering just not dealing with him anymore. I might not have asked for him to be a father but I just don't feel right knowing he's doing it for someone else. But I feel pretty lonely. I don't know what to do. I don't know if I should just go along with whatever and accept whatever minimal attention he decides to give me? Or if I should end this relationship completely? I don't know how to explain to him how I feel without going back on my word when I told him I wouldn't bug him for anything