Is it legal to love cousin?
Scientifically speaking, procreating with your cousin isn't that risky. In much of the world, consanguineous marriage between cousins is very common. For most Americans, however, marriage between cousins is at best a punchline, at worst a taboo. In many states, it is illegal for first cousins to get married.
Is it OK to date your first cousin?
Legally, you can date and be intimate with your first cousin, but if you are considering marriage, laws vary by state and country. As with all moral decisions, this is a personal, but complicated matter, given societal norms and the many who see cousin marriages as taboo.
Is it a sin to marry your first cousin?
The laws of many countries regarding prohibited relationships do not necessarily follow the biblical prohibitions nor those of any particular church. The Bible does not, for example, forbid cousins from marrying, but it does prohibit sexual relations with several other close relatives.