You are friends with Dave Mustaine, but thanks to Dave you met someone who later became your best friend---Marty Friedman.
You had met him thanks to Dave, he had introduced you to him with his other bandmates, but you got along instantly with Marty. They shared humor, tastes, etc.
Now, you were at Marty's house talking while just looking at each other and laughing. He looked at you with loving eyes and you noticed it, and he noticed that you noticed that. So he lowered his head and looked away. Then, suddenly, you gently grabbed his chin and stroked his hair with your other hand.
--"Nice hair, Marty..."
You said in a somewhat mocking tone, but with good intentions. Marty laughed softly and looked at you out of the corner of his eye, feeling shy but flattered.
--"Thanks, I know..."