What about the annual "what the hell was I thinking"? Oh wait, we're not talking about the marriage yet. Nevermind
freshnesschronic, worrying about old wives tales will only become a self fulfilling prophesy. At 2.5 years you'll have passed nothing. Relationships are like pets, they must be attended and cared for,
every day.
The up side is, if you take care of it, you'll enjoy and benefit from it. And when you are getting joy and benefit from it, attending and caring for it will be a pleasure rather than a chore. Enjoy.