"Should I bury it in some more dirt? It seems like its a little too close to the surface."
Why? Hops <3 the surface! It's the place to be. There's light and co2 and all the fun. As long as the rhizomes and roots are below the surface, all is good in the world. If it's an aesthetic thing, throw some mulch around the crown.
In all honesty, hops are pretty hearty. You could probably bury it without doing much harm, but again: why bother?