I say you start flirting was a different guy (make sure the guy knows you don't actually like him, use like your friend or something) and see if the guys get jealous. But you know I don't have a boyfriend so what do I know.
I like this guy, he always flirts with me too (playful teasing, hugging, eye contact, etc.) He likes a girl, who doesn't like him back, he knows this too! His friend likes me also, is he backing off for his friend, what do I do? Please help me!