Unfurtunately, I lent money to a boyfriend in the past (now ex). We had a verbal agreement for him to repay all that he owed and I kept receipts and logs of the money borrowed. I have never been able to collect any money from him, yet have a number of emails promising to do so (these are in writing, yet the original agreement is not). The amount is substantial and it has been several years since we split up. We both live in California. Any advice on how to get the money back? I would rather not pay that much for a lesson learned!