"My sister has a crush on this guy named Luca.He's a total babe.Everyone my sister knows that are girls love him too!!!What does she do for him to notice her or for her to find out if he likes her??????"

Dear Sister Love, Luca sounds like a hunk. In my experience Ive found that being up front about your feelings is the best. If she likes him then she should go and talk to him about her feelings or she could always ask him out and see what he says you can learn alot about someones feelings for you on a date.. Hope that was helpful.