I like it. Reminds me of that animation called "My Monster 'n' Me". Mostly because they're friends and they hang out goofin' about 'cept one of them is a monster. This is adorable really. And incredibly, and beautifully well animated. Fuck 3D. You just can't replace the soul that one puts into a smooth traditionally animated 2D visual story.
Anger issues are tough. I know because I have them. But give us a friend who happens to be fun & knows you well enough to understand what you're like when you do get angry, and they'll usually calm us down after a little while. It also helps if said friend happens to be cute/adorable like in your animation.
Also, the scene where you turn into a dog and eat chocolate with your friend is just... not registering to me... because choco is poisonous and deadly to canines. So technically you should be dead. :D