Help .

I’ve been with my fiancé for 2 years and Sunday we had gotten into an argument on Sunday.. he came home and grabbed his xbox and went over to his moms house.. his mom has always been kinda in control of him and likes to put things in his mind when he’s upset and he’ll listen to her he’ll say a lot that it’s his mom.. we have a 5 month old and another one on the way.. all yesterday morning he was telling me how he loves me and wants to be with me and then all sudden at night he’s like I don’t want to be with you and etc.. idk what to do I’m so confused I’m really really hurt.