Bf regrets baby?

I been having this gut feeling that my boyfriend regrets and is not so happy about this pregnancy. Our sex game was like on point every other day but the moment I found I was pregnant he has been distant not just sexually. We’re very affectionate people always laying on each other but now we barley touch one another and now when we have sex he pulls out and finishes by jacking off. Every time so I want to say something but I don’t know what to say exactly and oh yeah he avoids conversation about the baby every time.