When two people just start dating it's completely magical. Everything is new, exciting and fresh and you can't wait to get to know everything about the other person.
In the first 3 months of a relationship you'll end up eating their burnt french toast in the morning and telling them you love it and watching sports games you would have slept through before.
After 3 months in a relationship you reach that stage where you decide if you really like the person enough to make a serious relationship work or if it was just a short-term fling.
But if you know they're the one, eventually you'll end up at that 3 year mark where nothing can surprise you about your partner anymore.