He can't legally stop you from divorcing him, but you may want to consider on what grounds you officially separate from him as it may have impact on how your joint assets are divided and what kind of custody will be granted over any children.
This is a sad question and has no real easy answer. It's going to be difficult, but you need to focus on what will be best for both of you. Don't get stuck on thinking how bad his life will be without you - he deserves someone that will feel the same way about him … Read more