What propels tom to want to run away to Jackson island? What does this tell you about his emotional state?

Tom is pretty stressed out. He has witnessed about being a witnessed to Injun Joe killing a man. On top of that, Becky Thatcher turns him down at school, She turned, with her nose in the air, and he heard her say: "Mf! some people think they’re mighty smart—always showing off!" Tom meets Joe Harper who is also stressed so they decide to run away to Jackson Island and be pirates.