Hi dreads, I am so sorry for what you are going through. It is very hard to stop behaviors we have had for long periods of time but it can be done. A positive is you realize you were being codependent and wish to stop.
Because he left the program it shows his unwillingness to stop using. You need to do what is best for yourself and move forward. Can your business survive without his input? Personally I wouldn't have even brought him the check. Please keep coming here as you will find so much understanding, caring, supportive people who want to help. Don't ever give up. You can get through this. It's not easy but you can do it with many here supporting and guiding you, it will help so much! HUGS