normally when a guy feels comfortable around a girl it means exactly that. he feels at ease, not pressured, this comes sometimes with a guy trusting the girl enough to open himself up as a true friend and confidant. it could also mean he likes you enough to feel comfortable around. at present time maybe just as a friend , however this depends on if your interested in it deleloping into something more and your feelings towards him. it would seem that because you've expressed this questions you may be interested in that. are you comfortable around him as well even though he's white and your black. . I'm assumming that the age bracket (18-24) that last year of hi school or in college.
other than feeling comfortable around you has he shown any body language or signs that you might have noticed to say that he may have futher feelings for you.