Can a 6th grader date an eighth grader?

Yes, the general rule is half + 1.

Therefore, if the 8th grader is 14, he can date people around 8 years old without it being "weird".

But that's just what people say. Do what you want to do. If both people are about the same level of maturity, it should be fine. good luck! Lol thats stupid question no 6th graders shouldnt be dating in the first place and of course a 6th grader wouldnt be on the same maturity...common sense