Why can’t couples stay together without the stamp of marriage?
You can ask many questions like that in life, not only for marriage. It’s not a book rule to follow & it’s common today to be called a “Live-in Relationship”.
Although the legal status of live-in relationships in India is unclear, the Supreme Court has ruled that any couple living together for the long term will be presumed as legally married unless proved otherwise.
There may be hassles in proving the relationship and the disputes arising out of it could prove costly to settle.
When you are committed, why should you take risks?
Stay together, Stay Safe.