We’re starting an LLC. My partner is incarcerated until 2028. I’m paying the expenses. I don’t want to become in debt or have my credit score drop. How do I prevent this?

Hello my business partner is incarcerated until 2028. I am paying all of the expenses for the clothing. I have ok credit and he doesn't have credit. I would like to go into an llc together as this was his idea. I just do not want to become in debt or have my credit score drop. Would I  be liable if he puts the business in debt? Also we do not want any other llc members, just us. We are starting the llc within the next few weeks