Tell him no. If he is able to threaten to end the relationship if you don't do what he wants and it works. It is likely he will use this tactic again. If he ends the relationship over this then I don't believe he loves you.

You moving in with him is in his best interest, not yours. He is being very self-centered. Everything is about him and what he needs.

His plan to spit the bills is also not fair. It sure does benefit him though. Here is a fairer way to split the bills. https://adamhagerman.com/share-expenses-living-together/

Call his bluff on moving out, if he breaks up with you over this then he doesn't love you. Don't let him put you in a position where he calls the shots because you are desperate to keep the relationship at all costs, and he can throw it away whenever he feels like it.