Help!! need some help be great if you could give me some advise?

ok my boyfriend left me for someone else. im over it now. but ive always had this thing in a big way for this friend hugh crush . and i always liked him from the first day i ment him and hes single aswell but i dont know how he feels about me and i cant ask cause il make a fool of myself . what do i do about it i know my ex wount be to happy but i dont care about him anymore. so how do i show i really lke him without getting the wrong idea