Feeling so fed up 😩

My man left Friday to start the moving back home process it's now Sunday and he is coming back to our current home Wednesday or Thursday night.... and I honestly feel so alone he's taking his boys (my bonus sons) and honestly just feel like my whole world is crumbling in front of me.. I'm sick right now, I have my babies but living in this home without him won't feel the same I haven't spoken to him since he left and I can't help but to feel like he left because of me... he is getting the other house ready but it won't be the same and I can't afford to move with him I try and be strong and not let him see it bothers me every time he talks about moving a little piece inside of me dies because I don't want to be without him... and my babies call him daddy they don't know my ex he left the last month of pregnancy and didn't even make it to the birth so oh well..... but I don't know how to deal with my so being gone... and I also have a German shepherd puppy who would be coming with me if we moved and I'm in the process of getting national certified

*** I physically can't pick up and move so please be kind when giving advice

Thank you