Most Helpful Guy
I think it's best to date/marry who you love and have a connection with.3
Most Helpful Girl
Yes and no.
Dating/marrying within our own race generally leads to more stable marriages due to the cultural similarities (I'm making an assumption here and I understand race doesn't equal to ethnicity), plus in some cultures both parties are reluctant to seek a divorce due to the social pressure exerted by friends and family - so they will work out a solution.
However, studies have shown that as education levels increase race becomes less and less of a factor - i. e., interracial couples are much more common when people obtain a high degree of education, possibly because they are more open and understand that race/colour preference isn't that much of a deal.
So to answer your question, it all depends on your socioeconomic backgrounds. There is no generalized yes or no for every one, as we are all different human beings.2