One of the most important things in any start up is to have open lines of communication. I think it's the number one thing that kills start ups. I would tell yo

One of the most important things in any start up is to have open lines of communication. I think it's the number one thing that kills start ups. I would tell your co-founder exactly what you wrote here. It always feels really good when you explain to your co-founder why he's making you upset, he understands and you guys work together to fix it.