SHAVE IT!

I initially did it a few years back.. easily one of the best decisions of my life. At this point, I have forgotten what hair is like. Think of the money you'll save on shampoos, haircuts, etc.
Your head has a fine shape. You'll be just fine.

I'm not saying that the following is the case with you, but nothing's worse than a guy who's trying his hardest to hold on to what little hair he has left. Don't sit on it and let it get to that point.