Which of these describes your relationship to a Spanish citizen?
Spain — Marriage
Marriage to a Spanish citizen does not make you Spanish — no period of marriage does, on its own. What it does is cut the residence you need from ten years to one. Because the rule is written around marriage specifically, the exact status of the relationship decides whether the route is open, so it is worth picking the answer that is literally true rather than the closest one.
I'm married to a Spanish citizen → I was married to a Spanish citizen who has died → I'm separated or divorced from a Spanish citizen → I'm with a Spanish citizen but we're not married — a registered partnership, or living together → My partner is a citizen of another EU country, not Spain → I'm not sure whether my spouse actually holds Spanish citizenship →