Echoing the others, he sounds like an excellent horse for you. For someone who has only been riding a year, you need a horse exactly like him- reliable, calm, and who you can handle by yourself.
A lot of new riders make the mistake of thinking they've mastered one horse, so they need something harder right away. But, you're learning so much right now, and as others have said, there's always something more to learn with horses. A good confidence-builder is worth his weight in gold.
There are always harder horses out there, so don't be in too much of a rush to buy one.