I'm white, and 98% of the man I'm attracted to are white. I know a girl who's white, and mainly attracted to black guys. I know a black guy, and hes only ever dated white girls.
It just depends really. You can't fit eveyone into a box. Normally people have a certain type they are attracted too. Some are tall, others have dark hair, ext.
I know a guy who would never be attracted to me because I simply wasn't his type. Dont worry so much, and no matter what if someone is going to cheat they are going to cheap. You would win the best looking man of the year award, and have a billion dollars in the bank, and that still won't stop a cheater. Someone else can be extremly poor, and look homeless, and have a girl who is faithful by his side