Is it OK to date your 5th cousin?
There is no law against cousin marriages. But if cousin marriage is the ONLY kind of marriage in your family for many generations, then leave your family and abandon your people in order to marry someone totally outside your clan.
Is it OK to Marry My Cousin?
In the United States, second cousins are legally allowed to marry in every state. However, marriage between first cousins is legal in only about half of the American states. All in all, marrying your cousin or half-sibling will largely depend on the laws where you live and personal and/or cultural beliefs.
Are 5th cousins considered family?
Cousin (a.k.a "first cousin"): Your first cousins are the people in your family who have two of the same grandparents as you. Third, Fourth, and Fifth Cousins: Your third cousins have the same great-great-grandparents, fourth cousins have the same great-great-great-grandparents, and so on.