[James98]

Don't worry too much about your dress or appearance. The important thing is to make contact. You must talk to him, and preferably privately, not in a group where the conversation is not personal. If you are standing in a group you could grab his hand and lead him away. Just this much will show him you are interested. Even awkward talk is much better than none. You have to show him you are interested and that you expect a response to confirm his interest in you. Preferably bluntly "Are you interested in me?" Guys are simple, they do not respond well to suggestions and implications, that is why you have to be direct. Go girl go!