look him in the eye, and give him a smile. if you want to be bold don’t be shy about it, even if you’re nervous which is understandable, it is attractive when a girl acts confident. it depends on how direct you want to be. it could be anywhere from talking to him and telling him you love your friendship and want to take it further. or you can be straight shooting and tell him that you are interested in him. it fully depends on the guy. if he’s a person confortable with accepting affection then give him a hug but when you are done with the hug stay closer to him, if he lets you close you pretty much have your answer right there. otherwise you really have to feel it out. the best thing you can do is not beat around the bush too much. be direct, and make sure its where you and him can be alone to talk about it. the smile is key though, the look may tell him you like him by itself. if you’re sure that he likes you, one of the boldest ways would be a kiss, but thats not always somethign that ends well. as a guy i can tell you that when a girl bites her lip when talking to me or keeps looking at mine, its a pretty good sign. just something to keep in mind.