Talk to your co-founder. It sounds like you're pretty sure that the problem can be resolved by taking a break. Try taking a week off. You're no good to your sta

Talk to your co-founder. It sounds like you're pretty sure that the problem can be resolved by taking a break. Try taking a week off. You're no good to your startup is you're burnt out and unable to work. Not taking a week off to rest now could cost you many weeks in the future. If you take some time off to rest and you don't feel any better seek professional help. Mental health is just as important as physical health and isn't something that you should feel ashamed about.