Your position is not uncommon. The best solution is to treat it objectively. Talk to your partner about a 3 month probation with some basic goals. It's vital t

Your position is not uncommon. The best solution is to treat it objectively. Talk to your partner about a 3 month probation with some basic goals. It's vital to point out that this is not his probation - this is the project's probation. Both partners use this time to observe progress. At the end of the period, do a review. Depending on your conclusions, you may continue to work together, change the balance, or begin an exit strategy. This approach offers a "light at the end of the tunnel". If you ultimately decide to fold the project, you can be confident that the decision was made carefully, and not through a sudden meltdown. And if the project succeeds, you can continue this form of quarterly progress reviews...