I think even around 3 it's not that risky, but yeah, definitely something to consider.RedPandaMan said:How close of a cousin? Genetically, at around 4 or 5 it's okay, just a social taboo.
Overall I'd say I have mixed feelings. Probably because I grew up pretty close with all of my first cousins and so dating them seems inherently wrong. But I guess if you didn't grow up together and have genuine chemistry...eh *shrugs*. The only real problems would be if you end up staying with her and, depending on how close of cousins you are, having kids could be an issue. Or it could affect the entire family negatively, which could be hard to deal with if the two of you end up alienated. I guess it depends on how open minded your family is.
Something else to keep in mind though, is that people have done far weirder things. The grandson/grandmother relationship pop immediately to mind. Dating your cousin isn't really all that far out there in comparison.