So I'm 17 weeks pregnant and my father is child just started acting different a month ago. We barely…

So I'm 17 weeks pregnant and my father is child just started acting different a month ago. We barely talk and he acts like he doesn't care or doesn't wanna be involved. My heart and feelings are literally crushed. I just don't know if I should keep trying with him or just give up. We have been dating for 5 years but broke up like a 3 weeks ago. Idk what to do.