I had a friend who was in a somewhat similar situation about a year ago. He had founded a start-up with 3 other partners. Two of the partners weren't getting al

I had a friend who was in a somewhat similar situation about a year ago. He had founded a start-up with 3 other partners. Two of the partners weren't getting along to the point where they either weren't speaking at all, or would just scream at each other. They had had some success in the business, but if they had to buy out the troublesome founder, or come to some other agreement, they would have essentially be forced into bankruptcy. What to do? They went to 'founders therapy'. That's not a joke. They went to a combination therapist/mediator to work out there issues and figure out how to work together. My friend said that along with improving the relationship with the troublesome founder, it improved how they all work together and the business as a whole has been very successful since. The great thing about going to therapy (if you can convince your co-founder to go) is that you both may gain knowledge that would help you in future business situations aside from just dealing with your current co-founder. He may learn to recognize when he's being too controlling, and that could improve business all in, or maybe he isn't actually being controlling, but you're reading something else into it. Worked for my friend, your mileage may vary. Best of luck .