<human>: Just what the title says. Sorry for the long version - we moved around a lot! I lived with my boyfriend since we started dating. In college, he'd stay at my apartment. We moved to another city and he lived with me (off the lease) while I paid. I moved out of town for a year and my parents helped him pay rent while I was gone. 

We moved to another city. We got a place and we were both on the lease. I was unemployed for a year and he had a job, so he paid rent. I think he paid every month but I was paying the utility bills, and he was using my car. Two years later, we broke up and now he says he wants to file a suit for the rent that I wasn't paying. His memory is wonderfully selective, seeing how much I was paying in the beginning of the relationship and how much my parents helped him. However, during that time we weren't on the lease together, so I don't know if legally that helps me out.

Summarize the given text in a few sentences.
<bot>: Boyfriend and I lived together for two years with me not paying rent. Now we are broken up and he wants to sue for that money. Does he have grounds?