Making a move


So there is this guy who is friends with my roommate. Apparently he’s attracted to me, according to my roommate. She said that I should go for it but I’m unsure about how to go about it. He isn’t a dominant or assertive person but I’ve made it clear that I’m attracted to him. I’m not sure what he wants but I know it’s something casual. Should I make a move or wait? How should I make a move without causing awkwardness??