Why do white girls show more interest in me than black girls? Especially in college.

I'm trying find a sista but these white girls eye and smile at me more than the black chicks. It's so depressing and hard to find black girls at my school.
lets be clear im not tryna start anything.
You'll slowly learn that when black women are attracted to you, they will *eyeball* you...stare, roll their eyes...*eyeball* you again...roll their eyes again...and then suck their teeth and expect you to "game" them....those are the mating signals
White chicks tend to be more the types that they actually start up small talk conversations about random shyt like the weather, what the "homework assignment" (for your case) was, favorite bars to hang out etc....they tend to do those things in more conducive environments that are appropriate for socializing...(i.e. you won't see them do this in the street very often)
All in all, if you're intent is to get a black woman, you have to be able to read their signals...women of different races and cultures have different socially acceptable cues for being approached and/or asked out.
The problem in your case seems to be that you're expecting the black women to send the same signals to you as a white woman would...and that's just not how it is...