Would the court view $6K as a gift toward the purchase of a car for an ex I was supposed to marry?

I charged $3,000 on my credit card and wrote a check for $3,000 to a car dealership in NY for a car for my boyfriend (he asked if I could help him and since I was going to marry him, I thought I would be using the vehicle at some point if I needed to move large items). The check and cc transactions are tied to a purchase contract in his name only. He broke up with me and I asked him to be a gentleman and repay the $6,000. He said the $ was a gift. I don't want to fight with him but I am wondering if I have a legal leg to stand on?