I bring a buyer interested in a friends property and they don''t reach agreement. Some months later, they close with another broker. Am I owed comm?

My friend has a property listed for months, and did not sell it. I suggested I could bring a client, he accepted and I did bring an interested buyer. They could not agree on a price. I kept insisting to the buyer that it was a good property for his business (development).Two months later the buyer asked me if the property was still available, and my friend said it was under contract, so I informed the buyer. Two moths pass, and my friend tells me he close on the sale; after I find out is the same buyer, but using a different agent. Am I owed my commission?