Gender in Genesis 2, is not about social stereotypes or personal feelings. It’s about the way humans exist in relation to each other, and the way they live out God’s plan.
Ephesians 5 teaches married people how to echo Christ's relationship to his bride. But the whole of Ephesians tells us that every believer—married or single—shares in that reality directly, and was called to it from before the creation of the world.
Being male and female in the wake of Christ means both more and less. The meaning of gender has been revealed. Yet gender is also relativised and overshadowed: the differences between man and woman are less significant than their common life in Christ.