Ask anyone who's ever been on a long car ride with him. Gasoline DOES go bad, Carol. And there are two things that happen to it. One is that the volatile portions of the gasoline evaporate over time. And that makes your car harder to start, since the engine counts on being able to vaporize the gasoline in order to ignite it.
Gas can even be fine for more than a year.
But a year is the point at which gas is considered questionable. So if you're going to leave your car for a year or more, then you want to add a gasoline stabilizer and fill up the tank all the way to minimize the gasoline's contact with air - which is what causes the gums to form. But if you're filling up the tank once a month, or even once every couple of months, there's absolutely nothing to worry about, Carol. Keep on walking. Good for you.