Surgeons can open up the aortic valve. This is done through a catheter in the neck. They can open the valve up to a certain percentage. Ask your doctor if you are a candidate for this procedure or if you have to have a valve replacement or repair. Is the valve calcified at all?
You will probably need your valve replaced when it becomes severely narrow or you start showing symptoms such as shortness of breath or fatigue.
Don't worry - you certainly can lead a normal life following valve replacement. You may have to take medication but that's all. I had mine replaced ten years ago and have been doing fine. Valve replacement is common these days and the outlook is excellent.