My vanity is I’m terribly romantic! But being married is lovely.

Macfadyen frames “vanity” not as arrogance but as a self-aware admission of sentimentality: he takes pride in being “terribly romantic.” The second sentence pivots from temperament to lived experience, suggesting that romance is not merely an idealized fantasy but something he finds affirmed in the everyday reality of marriage. The juxtaposition implies a gentle rebuttal to cynicism about long-term partnership—romantic feeling can coexist with, and even be sustained by, commitment. The tone is lightly humorous and confessional, presenting romance as a personal trait and marriage as a gratifying, stabilizing context for it.