This is pretty common in the early stages of BAV "disease." You have a condition that warrants monitoring, but odds are strongly in your favor that things will progress slowly at first (in fact, many patients never progress and never require treatment - heck, many don't even know that they have the condition). Early on, there is little to be done. You cannot really affect the progression of your valve. It will or it won't. It may be faster than some, maybe not. We monitored my valve for over 11 years before surgery. Everyone is different.
If your cardio is asking for a repeat visit in 2 years, he/she seems to believe that you are just at the beginning of all this, and that a 2-year return schedule is OK. Some cardio's ask patients to return in 1 year for check-ups. It depends upon their interpretation of the severity of your condition. It sounds like you'll be in The Waiting Room for some time. Enjoy life while you're waiting. Just have all of your scheduled checkups and tests and see where it takes you.