You definitely need to talk with him about this, sooner rather than later. For it to work long term you need to not feel smothered. If he is going to smother you like you're worried about then it will just push you away in the long run. If what you need is one night a week to yourself, that's ok to ask for. If he can't handle giving you the space you need then it's not fair for you to stay in it just for him.