Quite a beautiful closeup of this little bee. The image looks a little grainy, sort of like maybe you cropped in a lot? It also seems to lack contrast a bit. I like the placement of the bee/flower at the bottom right, however, IMHO there's a bit too much negative space.
Nice coloring on this guy, but the composition, narrow depth of field, and general fuzziness all hurt it. I'm finding that good macros are very tough to do.