A friend and I purchased a condo to use as an investment property and we decided to split the expenses 50/50. He lost his job and can't pay his half?

We are both listed on the mortgage loan. We both split the down payment 50/50. We both used our personal finances to furnish the condo. We had been splitting the costs on the bills 50/50 and any rental income that we received, would be used to pay bills or divided equally. He got laid off from his job about 2 years ago and that same year he got sick and had to have surgery. While he was recovering from surgery, I paid 100% of the bills and handled all condo responsibilities. He has now since recovered from surgery and is working part-time. I've pressed him to get a full-time job so that he can pay back his share of past bills that I covered and also pay his regular monthly responsibilities. The amount he owes is currently less than the small claims. He has started paying me about 30% of his share of the bills and the amount that he owes me continues to grow. I would like to know the best way to force him to pay what he owes or get him off of the mortgage so that I am sole owner