How long do I have to sue someone who owes me and I have a promissory note?

Question Details: Over the course of about 5 years, I made my ex-boyfriend several loans. Each time with a promissory note which includes the current amount of what he owes me. Hes never had a job and has defaulted on each deadline I've made. The last updated promissory note was made about 7 months ago, and he was supposed to make first payments this past March. He has since gotten a job (this motnh) but he has not contacted me to pay me back. He owes me a little over $3000. How long do I have to sue him and can the state force him to pay me what he owes me? Important Notice