The Verdict: Need More Info
An engagement gives you nothing yet, but a stable union may already qualify you without a wedding. Find out whether you can prove one: a union registered before a notary, or the documents of a shared life.
Brazilian law gives family reunion residence, and the one-year route to naturalisation, to a spouse or to a partner in a stable union (união estável). The second needs no ceremony.
If you can prove the union, register it before a notary and you can start now. If not, marrying is the route, and a marriage celebrated abroad is worth transcribing into the Brazilian registry.
Tell us how long you have been together and whether you share an address, and we will say which is faster.