Is the difference between dating and a relationship
This and we also take time to just sit in our pjs and watch movies and eat ice cream all day.
Once you get comfortable doesn't mean the fun has to end.
Your collective behavior will decide the tenure of your association.
When you get comfortable is when you truly get to know the other person because they aren't busy trying to impress you or you trying to impress them.
When you get comfortable is when you truly fall in love.
Dating and "being in a relationship" are both about getting to know the person.
But it is very different when you are casually dating versus when you are in a committed relationship.