This is not a direct answer to your question but rather my 2 cents from my own experience. I have done partnerships and honestly avoid them whenever possible. One reason, is usually in your eyes no one is working harder than you. Partnerships are good if it's the only option to making a deal happen and it makes sense financially.
I agree with @Jim Adams and no matter what you decide get it notarized. Personally in partnerships I've had a lawyer draft the partnership and it gets filed with the LLC we created. EXPECTATIONS need to be laid out in the open right out the gate in writing. While you can't think of everything its good to have the basics out in the open. That is also a valuable lesson I have learned.
In a situation similar to yours the same thing kind of happened and I opted out of the partnership and went it alone. Best thing I ever did. I sat down and figured out why I was taking on a partner(s). Fear, confidence, sharing the responsibilities with others, fun to do the work with a buddy, Etc. I found that all my reasons were based on going down an unfamiliar road by myself and felt it would be easier with a partner. So I went it alone and it has molded and been the reason for my more rapid growth in investments. No stresses of always wondering if the other partner is doing the same or more work than me.
After that I got active and found investors to fund projects so I could BRRR. Made them money and didn't need a partner that was going to take 1/2 or a 1/3 of my cash flow. There is a million different ways that can look.
Hopefully my quick rant helps you.