It is totally possible to not getting into marriage.

But you might want to rethink the benefit of the institution of marriage :

1. Legal Justification: Marriage provides automatic legal rights and protections that unmarried couples may not have. This includes inheritance, medical decision-making, and property ownership.

2. Social Norms: Unmarried couples might still face questions and judgments. You will constant face questions from people. If both of you do not mind, it will be fine. But think about your extended family, your children. 

3. Commitment: Marriage, as a ceremony, holds the power to solidify commitment. It provides a structured framework, a safe haven within which couples can navigate the inevitable challenges of life.

4. Economic Benefits:  Marriage often comes with financial advantages like tax relief, spousal benefits in insurance plans, and easier access to joint loans.