The unipolar order that governed Asia's economic and security architecture for three decades is dissolving. In its place stands a fragmented, multipolar system in which regional groupings built for a different era struggle to deliver either security or prosperity. SAARC has not held a summit since 2014. BIMSTEC, twenty-nine years after its founding, still channels barely a fourteenth of its members' trade through its own members. India and Indonesia, the two largest democracies of the Indo-Pacific, each carry a national mission timed to a centenary: Viksit Bharat by 2047, Indonesia Emas by 2045. Neither mission can be advanced by forums built for consensus among the weak. This paper argues that India should abandon the instinct to route its Southeast Asian and South Asian ambitions through multi-country initiatives assembled in haste, and build instead a full bilateral nexus with Indonesia: a strategic partnership dense enough in trade, defence, connectivity, and institutional machinery to function as the anchor of a multipolar Indo-Pacific. The two countries do not need another summit photograph. They need an alliance.