Most Helpful Guys
Chances are his a complete idiot and has watched to much anime or porn.. Or he is simply very inexperienced and does not understand the situation he is in
You can't be hot to every guy, all the time - Every guy has different tastes, he may like someone else - If you are sure he has no romantic interest in you, you are as well moving your romantic attention elsewhere other wise it is beating a dead horse.
Most Helpful Girl
maybe you're just not his type. there are people who say Scarlett Johanson isn't hot. and try not to look too desperate, buys can sniff it. the fact that you wore sexy clothing for him makes me think you are trying to hard. it's one of the most unattractive things a girl can do