How to handle a rejection, from your clmate, you have to face daily?

There may not be better girls out there, because there is nothing wrong with the one who rejected you. There will be other girls though. If you see her everyday, be the person you have always been... Friendly. Like you treat everyone else. The heart can take awhile to heal, but it always does. You're doing the best thing you can do by trying to cheer up. Remember only one person has "rejected" you. Most haven't. Don't allow your feelings for that one to overshadow all of the others who think you are a great guy. Don't waste life carrying this burden around.