I don't know what to do 😭

Since finding out I'm pregnant my boyfriend of 3 years has completely isolated from me, he has just shut me out althogether. He doesn't even say hello to me after coming home from work, doesn't talk to me, message me or even ask where I am if I'm not home overnight. To top it off has just ignorantly told him mother on the phone that all he cares about is his car, not me or his unborn child. Whenever he gets a day off he leaves me, drives an hour away to his aunts house to work on his car with his mates. I don't know what to do any more. I'm sick of crying over him but I need to make this work for our child.