Did he know you were planning to leave? If not, can you make business changes to let him know you do this and that with the financial issues and you would like to have half of the business see an attorney for particulars first if needed? I believe in CYA cover yourself, then try al-anon. Do not ever make an ultimatum to yourself or others until you have totally worked out everything including your feelings. I know I am doing that. I wish you the best. Welcome to SR.