sean there is something you must do before you ask this girl out. put on your fav outfit (or stand in your underwear or naked or whatever you think you look the best in) and look in the mirror and tell yourself
" I AM HOT STUFF". sure it may sound stupid at first, but after saying it in your head and outloud a few times, you'll realize that you truly are hotstuff and you'll see what the girl sees in you. make sure you do it!!!
sure it may sound shallow and cocky but it works. trust me.