Can my ex sue me over things he has paid for over the course of relationship?

We met four years ago, and quickly became a couple. Over time, it became abusive and messy and toxic, which is the reason why I ended our relationship this last month. Unfortunately, we have one month left on our shared apartment lease and are living that out as well we can. As far as I am aware, I am not responsible for a lot for his debts regarding his credit cards, his car, or the loss of savings during the relationship. His abuses have escalated to threatening me with court whenever I disagree. I am responsible for a lot of what he's asking for. While I am more than willing to pay shared household bills, I have missed over the last four months due to job issues and move-out costs, he seems to think I owe him more, and he is actively pressuring and scaring me into paying more than I am responsible for. Can he take me to court?