Another vote for MG. You say your voice is MG, and this will weigh heavily in the choice. Animal characters are usually MG, your comp title is MG, your crush-romance is MG level, and your desire is to write MG. While some "finding your community role" is YA, the book you comp, THE GIVER, does that for MG. I think you'd run into more obstacles trying to spin this as YA.