what should i do

so my bf and child father of 6 years jus randomly said he wants to co parent while im pregnant with our 2nd and our daughter is 8 months .. we was perfectly fine i mean we did argue alot but never to separate and suddenly he became distant .. when I asked him whats goin in he says its too much arguing and he needs a break from it all but yesterday he said we just goin to co parent and im like whats goin on its so random and hurtful he not tryin to give me conversation or explaination and now lately everything has been about our daughter which is great but i was with him for 6 years.. i thought we was guna move together and b happy that is the only reason I even got pregnant again and we broke up in november he beg for me back even gave me a ring im just so confused ! should I leave it and let him figure it out or keep trying? this all started like 2 weeks ago we barely talk havent had sex in 3 weeks either