Codling moth. Codling moth larvae are an important pest of apple trees and to some extent pear trees. The female adult moth lays eggs on apple fruitlets in late spring, and the resulting larvae burrow into the developing apples. They damage the inside of the apple.
Keep on giving it Haircuts and it'll evolve eventually. Eevee can evolve into an Umbreon at and between the levels 2-99. It needs at least 220 Happiness points but from what you said earlier (trusts you), it means that your very close to reaching that level. Makes sure that you level it up so that it evolves. If you don't level it up, then it won't evolve.
Espeon and Umbreon are certainly one of the more involved Eevee evolutions, since they require you to actually use Eevee in battle and keep them in your party for a while. This is because the only way Eevee evolves into either form is by strengthening the friendship between them and the Trainer.