What do you do if you like a guy who dosen't like you back?

i really really like this guy named "michael" but he sometimes likes me and sometimes not and one day my friend Hanna asked him if he likes me and he said idk but he lies to her and then i asked his step brother if he likes me and he said he talks about me at his house, i am going out with his best friend and i thought it would make him jealous but it hasn't so i really need help how to get him to like me again because i haven't liked someone like him before so it would be very helpful if you could tell me what i should do??? PLEASE!!!!!!!

well it needs time and you need pationce but if he know that you like him , then you should act like you dont and latter in time he will start to notice that he likes you trust me it works .....