“I love a guy and he loves me. We both like the same things too. The problem is his best friend has a asdfadsf ”

I love a guy and he loves me. We both like the same things too. The problem is his best friend has a crush on me too. It is sort of like a battle. They keep doing specail things for me but I only like one of them and the other one knows it also. I don't want to break up there friendship though. How do I make it stop!!