I need advice

My boyfriend's mom is getting out of jail soon and I've been told that he won't care about me at all when she gets out and that he's going to try to push me away. He's an amazing boyfriend and i'm terrified of him pushing me away. what do I do?

update: I talked to him and he said that he might ask for alone time for an hour or two but he wouldnt push me away and he wouldnt stop caring about me