How do u find out if a girl likes u?

ok i am a guy in school and i really love her she likes me as a friend but i love her more than a friend and i really want to go out with her the bad part is she is tring to go out with my homeboy and i dont want them to go out i want to go out with her i make her laugh a lot everyday we talk and i have her in 2 cles but the point is how do u find out if she likes u i dont want none of my freinds to find out please help