All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
What you said is not Kufr (disbelief) at all. You are a Muslim – praise be to Allah – and this word does not take you out of Islam.
However, you have to choose your words, take care of the etiquettes enjoined by the Sharee’ah, and avoid obscenity in your sayings. If you mean by that phrase the need for marriage, then if you had expressed yourself by saying: ‘We need to get married’, then this would be more appropriate and does not contradict the polite and well-mannered etiquettes enjoined by the Sharee’ah on the Muslim.
Allah Knows best.