Just need a little advice

My husband and I have been pretty rocky lately. He’s cheated on me in the past but we decided to try and fix it as we have kids together. He’s done great the past couple months.. now his best friends single and he’s acting weird.. he was trying HARD to get me to end shit yesterday with him. But wouldn’t tell me what he wanted.. I don’t want to be the bad person. But I’m pregnant again but this time with twins. I don’t want to keep stressing not to mention we split up everytime I’m pregnant.. if we do split I won’t take him back again. BUT how do I know if that’s what he wants if he won’t tell me..? We do have a toxic relationship unfortunately if that explains anything.. I don’t want any negative things I just want some insights. I don’t have anyone to talk to about it realistically.