If you have been living together a total of 12 months in a genuine and stable relationship, it makes sense to apply for residence visa under partnership and if your temporary visa is expiring anytime soon, you should look at renewing that too under partnership. You can find more details on immigration nz website or contact an immigration agent using this list
https://discourse.talkwithstranger.com/t/list-of-licensed-immigration-advisors-and-those-recommended-by-people/327
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